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| | Destination Mars |
 | | Though it is generally colder than most places on Earth, Mars offers a desert experience, punctuated by majestic mountains, many of them of volcanic origin, and dramatic valleys that make the Grand Canyon look like a humble ditch. |
 | | Named after Mariner 4, the American spacecraft that was the first to take close up pictures of Mars when it flew by in 1965, the Mariner Valleys are really a system of canyons almost ten times longer than the Grand Canyon and twice as deep. |
 | | If it is true that Mars was once a warmer place, this water ice may be the remnant of a time, perhaps as long as 4 billion years ago, when Mars was a watery planet and living things may have thrived. |
| www.amnh.org /rose/mars/pl4.html (649 words) |
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