A conversation on TED.com: RE-THINKING AN ALIEN WORLD.

Robert Winner
Joseph City, AZ
United States

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RE-THINKING AN ALIEN WORLD.

A Distant super Earth named "55 Cancri E" is wetter and weirder than astromnomers thought possible. NASA's Spitzer space telescope recently sent back information that has researchers re-thinking the nature of alien worlds.

The complete information is available on NASA space news.

Must a planet have the same charteristics as Earth to support life?

What would alien life be limited to in our view to be considered "life".

Do you believe that "life" other than on Earth exists?

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Xavier Belvemont
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Jan 15 2012: I've often thought about this myself, but I think it quickly becomes obvious that we expect that a planet must be like ours to support life and that it must be life in some way similar to ours...because we really have nothing else to go on.

Stephen Hawking had a documentary on this subject (alternate alien life). I think you would enjoy it.
Here is the introduction, not sure where the whole video can be found:
http://www.youtube.com/watch?v=bKjr5OFqhLo