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The discovery of evidence that life may exist elsewhere in the universe raises that most profound of all human questions: Why does life exist at all? Is it simply that if enough cosmic elements slop together for enough eons, eventually a molecule will form somewhere, or many somewheres, that can...
Hurtling in from space some 16 million years ago, a giant asteroid slammed into the dusty surface of Mars and exploded with more power than a million hydrogen bombs, gouging a deep crater in the planet's crust and lofting huge quantities of rock and soil into the thin Martian...
Last week that rock--dubbed ALH84001--landed on the front pages of newspapers around the world and seized the imagination of all mankind. At a televised press conference in Washington, a team of NASA and university researchers revealed that this well-traveled, 4.2-lb. stone--about the size of a...
As startling as these images were, they constituted just one of several lines of evidence that team leader David McKay cites as "pointing toward biologic activity in early Mars." In addition to the images, which McKay acknowledges are the weakest and most controversial parts of the evidence, the panel of...
Saunders compared the discovery of life on Mars to the detection of planets around distant stars earlier this year. The two discoveries together, Saunders said, greatly increase the odds that intelligent extraterrestrial life exists.