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Extraterrestrial Life323 articles archived since 1845

Are There (Microbial) Aliens On Earth?

In this episode, theoretical physicist, cosmologist and astrobiologist Paul Davies ponders the question of whether life originated more than once on earth, and how to find examples of a second origin if it did...

December 12, 2007 — Steve Mirsky

A Simpler Origin for Life

The sudden appearance of a large self-copying molecule such as RNA was exceedingly improbable. Energy-driven networks of small molecules afford better odds as the initiators of life.

February 12, 2007 — Robert Shapiro

Alien Friends

For people with Capgras syndrome, loved ones have been taken over by body doubles. Their experience teaches us that feelings are integral to perception

March 24, 2005 — Thomas Grüter and Ulrich Kraft
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Lifestyle Changes. Lifetime Benefits.

Lifestyle Changes. Lifetime Benefits.

A New Outlook for Old Age