I'm 50-50 on whether aliens exist somewhere in the universe.
I'll quote two posts from when this topic has come up before (here -
http://www.thisisbigbrother.com/foru....php?p=9071915).
Quote:
Originally Posted by James
Fermi paradox questions why we have no evidence of alien intelligence given the universe is billions of years old, and it would only take a fraction of that time for a sufficiently advanced civilisation to traverse, say, the Milky Way galaxy. Maybe we are the only instance in the universe of life or intelligence starting? We can't rule that out.....
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Quote:
Originally Posted by James
One of the reasons I have some doubts (now) about intelligent life existing elsewhere in the universe is that on Earth simple single-cell life started quite quickly, after conditions became right, but it took about 2 billion years for eukaryotic cells to come about which led to complex living organisms, and scientists think that this only happened because of a single chance encounter.
There's this Brian Cox video where he explains it - http://www.bbc.co.uk/programmes/p029n23h |
The video is from 26m 30s here
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