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| | | | | | | | Article Images |  |
A small planet with dramatic landscapes
| This image shows the topography of two of the hemispheres of Mars. The image was seen on the cover of Science magazine in May of 1999. The most prominent features in this image are: 1) The massive Hellas impact basin (upper-left) in the Southern Hemisphere which is nearly six miles (nine kilometres) deep and 1,300 miles (2,100 kilometres) across. 2) The lower-right image shows the Tharsis province that contains Tharsis Montes (Ascraeus, Pavonis, and Arsia), and the Valles Marineris canyon system and related outflow channels.
Credits: Courtesy of NASA/MGS | |  |  | |
| | | | Water and life
| The highest volcano in the Solar System, Olympus
Mons, rises 25 kilometres above the surrounding plain:
Mount Everest is only one third as high.
Credits: USGS/NASA | | | | |
| | | | | Controversy rages over whether this structure, found inside the
martian meteorite ALH 84001, is a fossilised bacteria.
Credits: NASA | | | | |
| | | | | This image, taken by NASA’s Mars Global Surveyor (MGS), may
show evidence of recent underground water seepage.
Credits: NASA | | | | |
| | | | | Water may once have flowed freely on Mars and, like the Earth,
the planet receives sunlight and has its own internal energy source. So the odds on primitive life thriving for at least some time during the planet’s history are reasonably good.
Credits: NASA | | | | |
| | | | | Water may once have flowed freely on Mars and, like the Earth,
the planet receives sunlight and has its own internal energy source. So the odds on primitive life thriving for at least some time during the planet’s history are reasonably good.
Credits: Courtesy of Calvin J. Hamilton | | | | |
| | | | | The splatter marks surrounding this impact crater suggest that
the ground was water- or ice-logged when the impact occurred.
Credits: NASA | | | | |
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