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95-586: American Flagg , which ran 50 issues (October 1983 – March 1988), was one of the first titles to be published by First Comics , an early alternative press comics company founded in Evanston, Illinois in 1983. Unusually for the time, the company offered its freelance writers and artists creator rights , including ownership of their creations. Regardless, writer-artist Howard Chaykin , then living in New York City , felt trepidation when First Comics approached him to do

190-590: A 1985 Kirby Award for Best Graphic Album for Beowulf . Dark Horse Comics would later reprint the Lone Wolf and Cub series in English, and finally complete it in 2002. In 2005, IDW Publishing revived Jon Sable and Grimjack with new miniseries and reprint collections of the First Comics issues, and would also publish a complete collection of Mars . In 2007 IDW also started reprinting Badger as well as starting

285-517: A Martian solar day ( sol ) is equal to 24.6 hours, and a Martian solar year is equal to 1.88 Earth years (687 Earth days). Mars has two natural satellites that are small and irregular in shape: Phobos and Deimos . The relatively flat plains in northern parts of Mars strongly contrast with the cratered terrain in southern highlands – this terrain observation is known as the Martian dichotomy . Mars hosts many enormous extinct volcanoes (the tallest

380-485: A classical albedo feature it contains. In April 2023, The New York Times reported an updated global map of Mars based on images from the Hope spacecraft . A related, but much more detailed, global Mars map was released by NASA on 16 April 2023. The vast upland region Tharsis contains several massive volcanoes, which include the shield volcano Olympus Mons . The edifice is over 600 km (370 mi) wide. Because

475-666: A foreword and afterword by Michael Chabon and Jim Lee , respectively. Dynamite Entertainment have also produced a hardcover collecting the prelude and the first twelve issues of American Flagg ( ISBN   0-9749638-4-4 ). There is also a series of trade paperbacks : First Comics First Comics is an American comic book publisher that was active from 1983 to 1991 and then from 2011 to present (stylized as 1First Comics ), known for titles like American Flagg! , Grimjack , Nexus , Badger , Dreadstar , and Jon Sable . Along with competitors like Pacific Comics and Eclipse Comics , First took early advantage of

570-422: A global magnetic field, the types and distribution of auroras there differ from those on Earth; rather than being mostly restricted to polar regions as is the case on Earth, a Martian aurora can encompass the planet. In September 2017, NASA reported radiation levels on the surface of the planet Mars were temporarily doubled , and were associated with an aurora 25 times brighter than any observed earlier, due to

665-482: A high ratio of deuterium in Gale Crater , though not significantly high enough to suggest the former presence of an ocean. Other scientists caution that these results have not been confirmed, and point out that Martian climate models have not yet shown that the planet was warm enough in the past to support bodies of liquid water. Near the northern polar cap is the 81.4 kilometres (50.6 mi) wide Korolev Crater , which

760-539: A huge splash at the 1984 Eagle Awards , the United Kingdom's pre-eminent comics awards. Chaykin and American Flagg! were nominated for ten awards, eventually winning seven. American Flagg! also won the 1983 Comics Buyer's Guide Fan Award for Favorite Comic Book and tied for the 1983 CBG Award for Favorite Character (Reuben Flagg). After issue #12, Chaykin continued the series while also working on such other projects as his revamp of The Shadow for DC Comics and

855-483: A line-up of artists that included Kyle Baker , Dean Motter , Mike Ploog , P. Craig Russell , Bill Sienkiewicz , Joe Staton , Rick Geary , and Gahan Wilson . However, the line lasted only a little over a year. First Comics ceased publishing in 1991, and closed their doors for good in early 1992. At San Diego Comic-Con in 2011, First co-founder Levin announced that the company would resume publishing new material in late 2011. Two years later, Mike Baron announced

950-483: A low of 30  Pa (0.0044  psi ) on Olympus Mons to over 1,155 Pa (0.1675 psi) in Hellas Planitia , with a mean pressure at the surface level of 600 Pa (0.087 psi). The highest atmospheric density on Mars is equal to that found 35 kilometres (22 mi) above Earth's surface. The resulting mean surface pressure is only 0.6% of Earth's 101.3 kPa (14.69 psi). The scale height of

1045-442: A massive, and unexpected, solar storm in the middle of the month. Mars has seasons, alternating between its northern and southern hemispheres, similar to on Earth. Additionally the orbit of Mars has, compared to Earth's, a large eccentricity and approaches perihelion when it is summer in its southern hemisphere and winter in its northern, and aphelion when it is winter in its southern hemisphere and summer in its northern. As

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1140-530: A minimum thickness of 6 kilometres (3.7 mi) in Isidis Planitia , and a maximum thickness of 117 kilometres (73 mi) in the southern Tharsis plateau. For comparison, Earth's crust averages 27.3 ± 4.8 km in thickness. The most abundant elements in the Martian crust are silicon , oxygen , iron , magnesium , aluminium , calcium , and potassium . Mars is confirmed to be seismically active; in 2019 it

1235-616: A new project on his Facebook page: "HOWL! coming next year from First Comics. Shane Oakley is the artist". Publishing resumed in June 2014. First Comics and Devil's Due Publishing merged to form Devil's Due/1First Comics LLC in June 2015. In addition to reprinting older properties, Devil's Due/1First Comics launched five new ongoing series. Despite the merge and emphasis on creator owned properties, both 1First Comics and Devil's Due intend to maintain editorial independence. First Comics and Devil's Due parted ways and by September of 2019, First Comics

1330-489: A new series. IDW also reprinted the four Oz stories by Eric Shanower originally published as issues of First Graphic Novel as Adventures in Oz . First Graphic Novel also featured colorized reprints of early issues of the original Teenage Mutant Ninja Turtles series. Mars Mars is the fourth planet from the Sun . The surface of Mars is orange-red because it

1425-502: A photo album of the Flagg's future domestic life, with many kids, a screaming shrew of a wife, and a balding, overweight Flagg. American Flagg' s first nine issues were released by First in a series of trade paperbacks , but after the collapse of First they went quickly out of print. Dynamic Forces and Image Comics announced a reprinting of the first twelve issues in both hardcover and paperback editions in 2004, but complications throughout

1520-436: A project. He recalled in 2010: My concern had all and everything to do with the fact that this was a brand new company, located in [a suburb of] Chicago. I'd always worked for companies I'd visited and had day-to-day-dealings with. [But] they talked about a financial plan that would make it possible for me to get out from under the debt I had accrued working for [publisher] Byron Preiss [illustrating early graphic novels ]. It

1615-467: A record of erosion caused by the catastrophic release of water from subsurface aquifers, though some of these structures have been hypothesized to result from the action of glaciers or lava. One of the larger examples, Ma'adim Vallis , is 700 kilometres (430 mi) long, much greater than the Grand Canyon, with a width of 20 kilometres (12 mi) and a depth of 2 kilometres (1.2 mi) in places. It

1710-581: A remnant of that ring. The geological history of Mars can be split into many periods, but the following are the three primary periods: Geological activity is still taking place on Mars. The Athabasca Valles is home to sheet-like lava flows created about 200 million years ago. Water flows in the grabens called the Cerberus Fossae occurred less than 20 million years ago, indicating equally recent volcanic intrusions. The Mars Reconnaissance Orbiter has captured images of avalanches. Mars

1805-460: A result, the seasons in its southern hemisphere are more extreme and the seasons in its northern are milder than would otherwise be the case. The summer temperatures in the south can be warmer than the equivalent summer temperatures in the north by up to 30 °C (54 °F). Martian surface temperatures vary from lows of about −110 °C (−166 °F) to highs of up to 35 °C (95 °F) in equatorial summer. The wide range in temperatures

1900-511: A series of comic adaptations of the Eternal Champion books by Michael Moorcock and English translations of the Japanese manga series Lone Wolf and Cub . The company's final major project was a revival of Classics Illustrated . The company partnered with Berkley Books (then Berkley Publishing Group) to acquire the rights, and Classics Illustrated returned with new adaptations and

1995-464: A small crater (later called Airy-0 ), located in the Sinus Meridiani ("Middle Bay" or "Meridian Bay"), was chosen by Merton E. Davies , Harold Masursky , and Gérard de Vaucouleurs for the definition of 0.0° longitude to coincide with the original selection. Because Mars has no oceans, and hence no " sea level ", a zero-elevation surface had to be selected as a reference level; this is called

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2090-478: A storm over a small area, to gigantic storms that cover the entire planet. They tend to occur when Mars is closest to the Sun, and have been shown to increase global temperature. Seasons also produce dry ice covering polar ice caps . Large areas of the polar regions of Mars While Mars contains water in larger amounts , most of it is dust covered water ice at the Martian polar ice caps . The volume of water ice in

2185-446: A television show that are causing outbreaks of gang violence. After he uses his emergency powers to interrupt the broadcast, he not only ends the violence, but also brings forth a series of events that causes the Plex to send in covert agents, the death of Hilton, and the unveiling of Q-USA, a secret TV station owned and operated by Krieger that opens Flagg's eyes to the nature of the Plex. As

2280-491: A very thick lithosphere compared to Earth. Below this the mantle gradually becomes more ductile, and the seismic wave velocity starts to grow again. The Martian mantle does not appear to have a thermally insulating layer analogous to Earth's lower mantle ; instead, below 1050 km in depth, it becomes mineralogically similar to Earth's transition zone . At the bottom of the mantle lies a basal liquid silicate layer approximately 150–180 km thick. Mars's iron and nickel core

2375-466: A year, there are large surface temperature swings on the surface between −78.5 °C (−109.3 °F) to 5.7 °C (42.3 °F) similar to Earth's seasons , as both planets have significant axial tilt . Mars was formed approximately 4.5 billion years ago. During the Noachian period (4.5 to 3.5 billion years ago), Mars's surface was marked by meteor impacts , valley formation, erosion, and

2470-527: Is Olympus Mons , 21.9 km or 13.6 mi tall) and one of the largest canyons in the Solar System ( Valles Marineris , 4,000 km or 2,500 mi long). Geologically , the planet is fairly active with marsquakes trembling underneath the ground, dust devils sweeping across the landscape, and cirrus clouds . Carbon dioxide is substantially present in Mars's polar ice caps and thin atmosphere . During

2565-452: Is Syrtis Major Planum . The permanent northern polar ice cap is named Planum Boreum . The southern cap is called Planum Australe . Mars's equator is defined by its rotation, but the location of its Prime Meridian was specified, as was Earth's (at Greenwich ), by choice of an arbitrary point; Mädler and Beer selected a line for their first maps of Mars in 1830. After the spacecraft Mariner 9 provided extensive imagery of Mars in 1972,

2660-406: Is a light albedo feature clearly visible from Earth. There are other notable impact features, such as Argyre , which is around 1,800 kilometres (1,100 mi) in diameter, and Isidis , which is around 1,500 kilometres (930 mi) in diameter. Due to the smaller mass and size of Mars, the probability of an object colliding with the planet is about half that of Earth. Mars is located closer to

2755-432: Is approximately half the diameter of Earth, with a surface area only slightly less than the total area of Earth's dry land. Mars is less dense than Earth, having about 15% of Earth's volume and 11% of Earth's mass , resulting in about 38% of Earth's surface gravity . Mars is the only presently known example of a desert planet , a rocky planet with a surface akin to that of Earth's hot deserts . The red-orange appearance of

2850-766: Is completely molten, with no solid inner core. It is around half of Mars's radius, approximately 1650–1675 km, and is enriched in light elements such as sulfur , oxygen, carbon , and hydrogen . Mars is a terrestrial planet with a surface that consists of minerals containing silicon and oxygen, metals , and other elements that typically make up rock . The Martian surface is primarily composed of tholeiitic basalt , although parts are more silica -rich than typical basalt and may be similar to andesitic rocks on Earth, or silica glass. Regions of low albedo suggest concentrations of plagioclase feldspar , with northern low albedo regions displaying higher than normal concentrations of sheet silicates and high-silicon glass. Parts of

2945-566: Is covered in iron(III) oxide dust, giving it the nickname " the Red Planet ". Mars is among the brightest objects in Earth's sky , and its high-contrast albedo features have made it a common subject for telescope viewing. It is classified as a terrestrial planet and is the second smallest of the Solar System 's planets with a diameter of 6,779 km (4,212 mi). In terms of orbital motion,

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3040-429: Is divided into two kinds of areas, with differing albedo. The paler plains covered with dust and sand rich in reddish iron oxides were once thought of as Martian "continents" and given names like Arabia Terra ( land of Arabia ) or Amazonis Planitia ( Amazonian plain ). The dark features were thought to be seas, hence their names Mare Erythraeum , Mare Sirenum and Aurorae Sinus . The largest dark feature seen from Earth

3135-426: Is due to the thin atmosphere which cannot store much solar heat, the low atmospheric pressure (about 1% that of the atmosphere of Earth ), and the low thermal inertia of Martian soil. The planet is 1.52 times as far from the Sun as Earth, resulting in just 43% of the amount of sunlight. Mars has the largest dust storms in the Solar System, reaching speeds of over 160 km/h (100 mph). These can vary from

3230-510: Is striking: northern plains flattened by lava flows contrast with the southern highlands, pitted and cratered by ancient impacts. It is possible that, four billion years ago, the Northern Hemisphere of Mars was struck by an object one-tenth to two-thirds the size of Earth's Moon . If this is the case, the Northern Hemisphere of Mars would be the site of an impact crater 10,600 by 8,500 kilometres (6,600 by 5,300 mi) in size, or roughly

3325-606: Is thought to have been carved by flowing water early in Mars's history. The youngest of these channels is thought to have formed only a few million years ago. Elsewhere, particularly on the oldest areas of the Martian surface, finer-scale, dendritic networks of valleys are spread across significant proportions of the landscape. Features of these valleys and their distribution strongly imply that they were carved by runoff resulting from precipitation in early Mars history. Subsurface water flow and groundwater sapping may play important subsidiary roles in some networks, but precipitation

3420-537: The areoid of Mars, analogous to the terrestrial geoid . Zero altitude was defined by the height at which there is 610.5  Pa (6.105  mbar ) of atmospheric pressure. This pressure corresponds to the triple point of water, and it is about 0.6% of the sea level surface pressure on Earth (0.006 atm). For mapping purposes, the United States Geological Survey divides the surface of Mars into thirty cartographic quadrangles , each named for

3515-644: The Yellowknife Bay area in the Glenelg terrain. In September 2015, NASA announced that they had found strong evidence of hydrated brine flows in recurring slope lineae , based on spectrometer readings of the darkened areas of slopes. These streaks flow downhill in Martian summer, when the temperature is above −23 °C, and freeze at lower temperatures. These observations supported earlier hypotheses, based on timing of formation and their rate of growth, that these dark streaks resulted from water flowing just below

3610-415: The asteroid belt , so it has an increased chance of being struck by materials from that source. Mars is more likely to be struck by short-period comets , i.e. , those that lie within the orbit of Jupiter . Martian craters can have a morphology that suggests the ground became wet after the meteor impact. The large canyon, Valles Marineris (Latin for " Mariner Valleys", also known as Agathodaemon in

3705-500: The graphic novel Time , based on characters introduced in a one-off American Flagg! special in 1986. During this time, Alan Moore wrote a back-up story that ran several issues and concluded in an issue-length story. Eventually, Chaykin left, to be replaced on a regular basis by first Steven Grant then J.M. DeMatteis . Grant left after only seven issues due to creative friction with the series's new artist, Mark Badger . According to Grant, he had wanted to continue doing stories in

3800-469: The possible presence of water oceans . The Hesperian period (3.5 to 3.3–2.9 billion years ago) was dominated by widespread volcanic activity and flooding that carved immense outflow channels . The Amazonian period, which continues to the present, has been marked by the wind as a dominant influence on geological processes . Due to Mars's geological history, the possibility of past or present life on Mars remains of great scientific interest. Since

3895-524: The 2020s no such mission is planned. Scientists have theorized that during the Solar System's formation , Mars was created as the result of a random process of run-away accretion of material from the protoplanetary disk that orbited the Sun. Mars has many distinctive chemical features caused by its position in the Solar System. Elements with comparatively low boiling points, such as chlorine , phosphorus , and sulfur , are much more common on Mars than on Earth; these elements were probably pushed outward by

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3990-577: The Late Heavy Bombardment. There is evidence of an enormous impact basin in the Northern Hemisphere of Mars, spanning 10,600 by 8,500 kilometres (6,600 by 5,300 mi), or roughly four times the size of the Moon's South Pole–Aitken basin , which would be the largest impact basin yet discovered if confirmed. It has been hypothesized that the basin was formed when Mars was struck by a Pluto -sized body about four billion years ago. The event, thought to be

4085-474: The Martian ionosphere , lowering the atmospheric density by stripping away atoms from the outer layer. Both Mars Global Surveyor and Mars Express have detected ionized atmospheric particles trailing off into space behind Mars, and this atmospheric loss is being studied by the MAVEN orbiter. Compared to Earth, the atmosphere of Mars is quite rarefied. Atmospheric pressure on the surface today ranges from

4180-538: The Martian sky a tawny color when seen from the surface. It may take on a pink hue due to iron oxide particles suspended in it. The concentration of methane in the Martian atmosphere fluctuates from about 0.24 ppb during the northern winter to about 0.65 ppb during the summer. Estimates of its lifetime range from 0.6 to 4 years, so its presence indicates that an active source of the gas must be present. Methane could be produced by non-biological process such as serpentinization involving water, carbon dioxide, and

4275-415: The Martian surface is caused by ferric oxide , or rust . It can look like butterscotch ; other common surface colors include golden, brown, tan, and greenish, depending on the minerals present. Like Earth, Mars is differentiated into a dense metallic core overlaid by less dense rocky layers. The outermost layer is the crust, which is on average about 42–56 kilometres (26–35 mi) thick, with

4370-542: The Moon, Johann Heinrich von Mädler and Wilhelm Beer were the first areographers. They began by establishing that most of Mars's surface features were permanent and by more precisely determining the planet's rotation period. In 1840, Mädler combined ten years of observations and drew the first map of Mars. Features on Mars are named from a variety of sources. Albedo features are named for classical mythology. Craters larger than roughly 50 km are named for deceased scientists and writers and others who have contributed to

4465-633: The Plexus Rangers and posted as a deputy in Chicago, Illinois . The first 12 issues, running through cover-date September 1984, consisted of four interlocking, three-issue story arcs. Chaykin recalled his difficulty in producing 28 pages of art and script monthly: "I was still a smoker and a drinker at the time. And [the output was such that] I'd never done anything like that before, and it was insane. It just devoured my life [and] I had no assistants. I didn't know how to work with an assistant at that point, and it

4560-601: The United States from its capital on Mars. Many population centers are grouped around massive, fortified arcologies called Plexmalls and the law is enforced by the Plexus Rangers, the absentee Plex's Earthside militia. The Plex has formed the Tricentennial Recovery Committee, to get America "back on track for '76", but the TRC is in reality a plan to sell the United States off to the new superpowers and to leech off

4655-462: The area of Europe, Asia, and Australia combined, surpassing Utopia Planitia and the Moon's South Pole–Aitken basin as the largest impact crater in the Solar System. Mars is scarred by a number of impact craters: a total of 43,000 observed craters with a diameter of 5 kilometres (3.1 mi) or greater have been found. The largest exposed crater is Hellas , which is 2,300 kilometres (1,400 mi) wide and 7,000 metres (23,000 ft) deep, and

4750-419: The atmosphere is about 10.8 kilometres (6.7 mi), which is higher than Earth's 6 kilometres (3.7 mi), because the surface gravity of Mars is only about 38% of Earth's. The atmosphere of Mars consists of about 96% carbon dioxide , 1.93% argon and 1.89% nitrogen along with traces of oxygen and water. The atmosphere is quite dusty, containing particulates about 1.5 μm in diameter which give

4845-406: The atmosphere is small, but enough to produce larger clouds of water ice and different cases of snow and frost , often mixed with snow of carbon dioxide dry ice . Landforms visible on Mars strongly suggest that liquid water has existed on the planet's surface. Huge linear swathes of scoured ground, known as outflow channels , cut across the surface in about 25 places. These are thought to be

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4940-466: The book, California was merely shown to have been abandoned for reasons that were vague at best), and characterizations began to drift considerably as well. (Among other things, Flagg abandoned his interest in 1930s jazz, and was frequently shown listening to late-1960s rock, as well as becoming more of a traditional stern-jawed good-guy hero). After trying and failing several times to shore up declining interests, First Comics decided to lure Chaykin back into

5035-459: The broken fragments of "Tintina" rock and "Sutton Inlier" rock as well as in veins and nodules in other rocks like "Knorr" rock and "Wernicke" rock . Analysis using the rover's DAN instrument provided evidence of subsurface water, amounting to as much as 4% water content, down to a depth of 60 centimetres (24 in), during the rover's traverse from the Bradbury Landing site to

5130-466: The cause of the Martian hemispheric dichotomy , created the smooth Borealis basin that covers 40% of the planet. A 2023 study shows evidence, based on the orbital inclination of Deimos (a small moon of Mars), that Mars may once have had a ring system 3.5 billion years to 4 billion years ago. This ring system may have been formed from a moon, 20 times more massive than Phobos , orbiting Mars billions of years ago; and Phobos would be

5225-458: The edges of boulders and other obstacles in their path. The commonly accepted hypotheses include that they are dark underlying layers of soil revealed after avalanches of bright dust or dust devils . Several other explanations have been put forward, including those that involve water or even the growth of organisms. Environmental radiation levels on the surface are on average 0.64 millisieverts of radiation per day, and significantly less than

5320-655: The first commercially published all-digital comic book. In 1986, despite its success with the direct market, First experimented with newsstand distribution. Later that same year, the publisher found itself in the middle of the industry-wide debate about creators' rights . Clashes with DC Comics, First, and other publishers on this issue led in part to the drafting of the Creator's Bill of Rights signed by Scott McCloud , Kevin Eastman , Peter Laird , Dave Sim , Rick Veitch , and other comics creators in late 1988. First also published

5415-429: The flanks of the volcano Arsia Mons . The caves, named after loved ones of their discoverers, are collectively known as the "seven sisters". Cave entrances measure from 100 to 252 metres (328 to 827 ft) wide and they are estimated to be at least 73 to 96 metres (240 to 315 ft) deep. Because light does not reach the floor of most of the caves, they may extend much deeper than these lower estimates and widen below

5510-574: The growing direct market , attracting a number of writers and artists from DC and Marvel to produce creator-owned titles, which, as they were not subject to the Comics Code , were free to feature more mature content. Based in Evanston, Illinois , First Comics was co-founded by Ken F. Levin and Mike Gold . It launched in 1983 with a line-up of creators including Frank Brunner , Mike Grell , Howard Chaykin , Joe Staton , Steven Grant , Timothy Truman , and Jim Starlin . In 1984, First acquired all

5605-556: The interior art, but the franchise failed to recapture its early success and was canceled after 12 issues. The story takes place in the year 2031, after a series of worldwide crises called the Year of the Domino (1996) has forced the U.S. government and the heads of major corporations to relocate to Hammarskjold Center, on Mars ("temporarily, of course"). In the wake of the American government leaving

5700-436: The lander showed that the Martian soil has a basic pH of 7.7, and contains 0.6% perchlorate by weight, concentrations that are toxic to humans . Streaks are common across Mars and new ones appear frequently on steep slopes of craters, troughs, and valleys. The streaks are dark at first and get lighter with age. The streaks can start in a tiny area, then spread out for hundreds of metres. They have been seen to follow

5795-554: The late 20th century, Mars has been explored by uncrewed spacecraft and rovers , with the first flyby by the Mariner 4 probe in 1965, the first orbit by the Mars 2 probe in 1971, and the first landing by the Viking 1 probe in 1976. As of 2023, there are at least 11 active probes orbiting Mars or on the Martian surface. Mars is an attractive target for future human exploration missions , though in

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5890-469: The mineral jarosite . This forms only in the presence of acidic water, showing that water once existed on Mars. The Spirit rover found concentrated deposits of silica in 2007 that indicated wet conditions in the past, and in December 2011, the mineral gypsum , which also forms in the presence of water, was found on the surface by NASA's Mars rover Opportunity. It is estimated that the amount of water in

5985-607: The mineral olivine , which is known to be common on Mars, or by Martian life. Compared to Earth, its higher concentration of atmospheric CO 2 and lower surface pressure may be why sound is attenuated more on Mars, where natural sources are rare apart from the wind. Using acoustic recordings collected by the Perseverance rover, researchers concluded that the speed of sound there is approximately 240 m/s for frequencies below 240 Hz, and 250 m/s for those above. Auroras have been detected on Mars. Because Mars lacks

6080-427: The mountain is so large, with complex structure at its edges, giving a definite height to it is difficult. Its local relief, from the foot of the cliffs which form its northwest margin to its peak, is over 21 km (13 mi), a little over twice the height of Mauna Kea as measured from its base on the ocean floor. The total elevation change from the plains of Amazonis Planitia , over 1,000 km (620 mi) to

6175-431: The movement of dry dust. No partially degraded gullies have formed by weathering and no superimposed impact craters have been observed, indicating that these are young features, possibly still active. Other geological features, such as deltas and alluvial fans preserved in craters, are further evidence for warmer, wetter conditions at an interval or intervals in earlier Mars history. Such conditions necessarily require

6270-470: The name Howard Chaykin's Amerikan Flagg! (The "K" and a reversed "r" were to reflect the fact that most of this series took place in Russia) and picked up from where the earlier book had left off (in 2032). There is some difference of opinion as to whether this new book was intended to be a limited run, or open-ended as is the norm with comics. In either case, it ended after twelve issues. The final issue ends with

6365-508: The northwest, to the summit approaches 26 km (16 mi), roughly three times the height of Mount Everest , which in comparison stands at just over 8.8 kilometres (5.5 mi). Consequently, Olympus Mons is either the tallest or second-tallest mountain in the Solar System ; the only known mountain which might be taller is the Rheasilvia peak on the asteroid Vesta , at 20–25 km (12–16 mi). The dichotomy of Martian topography

6460-462: The old canal maps ), has a length of 4,000 kilometres (2,500 mi) and a depth of up to 7 kilometres (4.3 mi). The length of Valles Marineris is equivalent to the length of Europe and extends across one-fifth the circumference of Mars. By comparison, the Grand Canyon on Earth is only 446 kilometres (277 mi) long and nearly 2 kilometres (1.2 mi) deep. Valles Marineris was formed due to

6555-827: The past. This paleomagnetism of magnetically susceptible minerals is similar to the alternating bands found on Earth's ocean floors . One hypothesis, published in 1999 and re-examined in October ;2005 (with the help of the Mars Global Surveyor ), is that these bands suggest plate tectonic activity on Mars four billion years ago, before the planetary dynamo ceased to function and the planet's magnetic field faded. The Phoenix lander returned data showing Martian soil to be slightly alkaline and containing elements such as magnesium , sodium , potassium and chlorine . These nutrients are found in soils on Earth. They are necessary for growth of plants. Experiments performed by

6650-696: The planet and the Soviet Union collapsing from Islamic insurrections, there was a power shift throughout the world, with Brazilian Union of the Americas and the Pan-African League becoming the new superpowers on Earth. However, the exiled American government, its corporate backers, and a group of technicians in the defected Soviet lunar colony of Gagaringrad form the Plex : a giant, interplanetary union of corporate and government concerns that conduct commerce and govern

6745-472: The population by using a combination contraceptive and antibiotic called Mañanacillin to reduce the population. This all changes when former television star Reuben Flagg is drafted and transferred to Chicago's Plexmall to replace the local Ranger Hilton "Hammerhead" Krieger's fallen partner. He witnesses widespread graft and corruption throughout the Plexmall, but also a series of subliminal messages implanted in

6840-408: The production process saw publication delayed until July 2008. This edition, entitled Howard Chaykin's American Flagg! Definitive Edition, Vol. 1 ( ISBN   1-58240-983-8 ; signed and numbered, ISBN   1-58240-984-6 ; Titan Books , ISBN   1-84576-102-2 ), features the first 14 issues of the original First Comics series, an all-new Flagg! story written and drawn by Chaykin, and

6935-566: The radiation of 1.84 millisieverts per day or 22 millirads per day during the flight to and from Mars. For comparison the radiation levels in low Earth orbit , where Earth's space stations orbit, are around 0.5 millisieverts of radiation per day. Hellas Planitia has the lowest surface radiation at about 0.342 millisieverts per day, featuring lava tubes southwest of Hadriacus Mons with potentially levels as low as 0.064 millisieverts per day, comparable to radiation levels during flights on Earth. Although better remembered for mapping

7030-470: The remaining inhabitants before gaining true self-sufficiency. As a result, the Plex has outlawed non-combat related education, organized sports such as basketball and personal aircraft, restricted media to only one outlet, the Plex itself (although it has multiple channels), and advocates and glorifies the use of political violence amongst independent policlubs by providing money and firearms for its hit TV show Firefight All Night LIVE! , and covertly sterilizes

7125-488: The same style that Chaykin had established, while Badger wanted to take the series in new directions. Chaykin returned for a brief run to wrap up storylines before the first volume ended in March 1988. The title was relaunched a few months later as Howard Chaykin's Amerikan Flagg! . This run saw Chaykin return to write the first issue before handing over to John Francis Moore , with Mike Vosburg and Richard Ory penciling and inking

7220-467: The series progressed, Chaykin took less and less of a direct role in scripting and plotting the stories out, and by the third year of its run, he really had nothing to do with the book other than cover art. Stories began to violate the rules that Chaykin had explicitly stated in the writer's bible for the series (for instance, California was said to have slid into the Pacific Ocean, but in the final year of

7315-462: The size of Earth's Arctic Ocean . This finding was derived from the ratio of protium to deuterium in the modern Martian atmosphere compared to that ratio on Earth. The amount of Martian deuterium (D/H = 9.3 ± 1.7 10 ) is five to seven times the amount on Earth (D/H = 1.56 10 ), suggesting that ancient Mars had significantly higher levels of water. Results from the Curiosity rover had previously found

7410-422: The south polar ice cap, if melted, would be enough to cover most of the surface of the planet with a depth of 11 metres (36 ft). Water in its liquid form cannot prevail on the surface of Mars due to the low atmospheric pressure on Mars, which is less than 1% that of Earth, only at the lowest of elevations pressure and temperature is high enough for water being able to be liquid for short periods. Water in

7505-461: The southern highlands include detectable amounts of high-calcium pyroxenes . Localized concentrations of hematite and olivine have been found. Much of the surface is deeply covered by finely grained iron(III) oxide dust. Although Mars has no evidence of a structured global magnetic field , observations show that parts of the planet's crust have been magnetized, suggesting that alternating polarity reversals of its dipole field have occurred in

7600-505: The study of Mars. Smaller craters are named for towns and villages of the world with populations of less than 100,000. Large valleys are named for the word "Mars" or "star" in various languages; smaller valleys are named for rivers. Large albedo features retain many of the older names but are often updated to reflect new knowledge of the nature of the features. For example, Nix Olympica (the snows of Olympus) has become Olympus Mons (Mount Olympus). The surface of Mars as seen from Earth

7695-513: The surface. However, later work suggested that the lineae may be dry, granular flows instead, with at most a limited role for water in initiating the process. A definitive conclusion about the presence, extent, and role of liquid water on the Martian surface remains elusive. Researchers suspect much of the low northern plains of the planet were covered with an ocean hundreds of meters deep, though this theory remains controversial. In March 2015, scientists stated that such an ocean might have been

7790-430: The surface. "Dena" is the only exception; its floor is visible and was measured to be 130 metres (430 ft) deep. The interiors of these caverns may be protected from micrometeoroids, UV radiation, solar flares and high energy particles that bombard the planet's surface. Mars lost its magnetosphere 4 billion years ago, possibly because of numerous asteroid strikes, so the solar wind interacts directly with

7885-607: The swelling of the Tharsis area, which caused the crust in the area of Valles Marineris to collapse. In 2012, it was proposed that Valles Marineris is not just a graben , but a plate boundary where 150 kilometres (93 mi) of transverse motion has occurred, making Mars a planet with possibly a two- tectonic plate arrangement. Images from the Thermal Emission Imaging System (THEMIS) aboard NASA's Mars Odyssey orbiter have revealed seven possible cave entrances on

7980-476: The titles of the short-lived publisher Capital Comics , including Mike Baron 's action/superhero/fantasy/comedy series Badger , and Baron and Steve Rude 's space- superhero series Nexus . Among First's best-known titles were Chaykin's satirical futuristic cop series American Flagg ; John Ostrander and Tim Truman 's Grimjack ; Baron & Rude's Nexus ; Badger ; Jim Starlin 's space opera series Dreadstar and Mike Grell 's Jon Sable , which

8075-502: The upper mantle of Mars, represented by hydroxyl ions contained within Martian minerals, is equal to or greater than that of Earth at 50–300 parts per million of water, which is enough to cover the entire planet to a depth of 200–1,000 metres (660–3,280 ft). On 18 March 2013, NASA reported evidence from instruments on the Curiosity rover of mineral hydration , likely hydrated calcium sulfate , in several rock samples including

8170-420: The widespread presence of crater lakes across a large proportion of the surface, for which there is independent mineralogical, sedimentological and geomorphological evidence. Further evidence that liquid water once existed on the surface of Mars comes from the detection of specific minerals such as hematite and goethite , both of which sometimes form in the presence of water. In 2004, Opportunity detected

8265-404: The writer's seat. "American Flagg!" wrapped up its principal storyline with issue #50. By this time, Reuben Flagg had traveled to Mars, overthrown the Plex, and become President of the United States. He then decided to separate Illinois from the United States and run it as his own personal fiefdom. All issues of this series took place in the year 2031. The next year, the comic was re-launched under

8360-414: The young Sun's energetic solar wind . After the formation of the planets, the inner Solar System may have been subjected to the so-called Late Heavy Bombardment . About 60% of the surface of Mars shows a record of impacts from that era, whereas much of the remaining surface is probably underlain by immense impact basins caused by those events. However, more recent modeling has disputed the existence of

8455-607: Was a very difficult process. ... I was trying to do a fairly high-quality product and I didn't want to slough it off". Chaykin made wide use of Craftint Duoshade illustration boards for American Flagg! , which in the period before computers, enabled him to add shaded textures to the finished art. Ken Bruzenak 's lettering and logowork also won notice, as it was integral to American Flagg' s futuristic, trademark-littered ambiance. American Flagg' s first dozen issues form one complete story that has influenced comic creators including Brian Michael Bendis and Warren Ellis . The comic made

8550-434: Was briefly adapted for TV. In 1984, the publisher sued industry giant Marvel Comics , claiming that Marvel flooded the market with new titles in 1983 in order to shut out First and other new companies. In the same lawsuit, First also sued printer World Color Press for anti-competitive activities, claiming the printer undercharged Marvel for its business, and in return overcharged First and its fellow independents. The suit

8645-410: Was encouraging, so I went home and concocted a scenario, a pitch document, and that was it. Chaykin devised a series set in 2031, a high-tech but spiritually empty, consumerist world in which the American government has relocated to Mars , leaving what remains of the U.S. to be governed by the all-encompassing corporation known as the Plex. The series star is Reuben Flagg, a former TV star drafted into

8740-615: Was probably the root cause of the incision in almost all cases. Along craters and canyon walls, there are thousands of features that appear similar to terrestrial gullies . The gullies tend to be in the highlands of the Southern Hemisphere and face the Equator; all are poleward of 30° latitude. A number of authors have suggested that their formation process involves liquid water, probably from melting ice, although others have argued for formation mechanisms involving carbon dioxide frost or

8835-701: Was publishing titles under their own banner. Since 2019, First Comics has continued publishing creator-owned titles, including Inspector Oh and Love Town by Matt and John Yuan , Night Stalker by Orlando Harding , and the Dogwitch Omnibus by Dan Schaeffer . In December of 2020, First Comics launched its board game division, First Games (aka 1First Games) with a board game adaptation of the Garth Ennis and Darick Robertson series The Boys . In February of 2022, Matt and John Yuan were named Deputy Publishers. The company picked up many industry awards, including

8930-437: Was reported that InSight had detected and recorded over 450 marsquakes and related events. Beneath the crust is a silicate mantle responsible for many of the tectonic and volcanic features on the planet's surface. The upper Martian mantle is a low-velocity zone , where the velocity of seismic waves is lower than surrounding depth intervals. The mantle appears to be rigid down to the depth of about 250 km, giving Mars

9025-540: Was resolved in the spring of 1988. The company moved to Chicago in 1985. Mike Gold , one of First's founders, served as the company president until late 1985; Gold soon moved to New York to become a senior editor at DC Comics . Gold later used his First Comics connections to bring Grell, Chaykin, and Truman over to DC, where they created series such as Green Arrow: The Longbow Hunters , Blackhawk , and Hawkworld . From 1985 to 1988, First published Peter B. Gillis and Mike Saenz 's digital comic Shatter ,

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