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The
Impact Debate
Experts on asteroids and comets discuss the past, present, and future
effects of asteroid and comet impacts, on life and evolution, in this
4-part Impact Debate.
The
Rio Scale of Life
Sometimes being close counts – in horseshoes and romance, for example.
For SETI, however, it’s hard to argue that a close call is any better
than no call.
Survival of the
Flattest
Digital
Organisms Replicate and Mutate
07 October 2002: Recent research indicates that rapid reproduction may
not always be the winning evolutionary ticket.
Rare
Earth Debate
A special 5-part series on questions surrounding whether we're alone or
not. The panelists include the authors of the book "Rare Earth"
and SETI scientists Frank Drake.
Goldilocks Zone
Amid
the Universe's Chaos, a Few Habitable Places
28 May 2002: It took 4.5 billion years for Earth to generate and evolve
a life form that could think, reason, and finally fly off the planet.
That's a long time, even by cosmic measures. Perhaps too long.
The
Search for the Scum of the Universe
21 May 2002: The odds for extraterrestrial life on Earth-like planets
will be put at 1-in-3 in a soon-to-be published report in the journal
Astrobiology, but the smartest earthlings have no clue what that life
might look like or where to find it.
Is
There Life Beyond Earth?
Part of our series 5 Great Cosmic Mysteries which ran in
early 2002.
Life
On Mars: Swimming Right Under the Surface?
 24
July 2001: Little critters, lathered in natural sunscreen and swathed
in biological antifreeze, could be lurking just a few feet under the ice,
scientists say. These microscopic Martians might hibernate for months
or even thousands of years, waiting for a brief thaw, a personal spring
vacation, a chance to go forth and make more Martians.
Engineering
ET:
The Path to Alternate Life Forms
An emerging laboratory effort to create life that is decidedly not as
we know it alters the very nature of nature by creating cells that break
a cardinal rule of biology.
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