What were the odds that life would begin on earth?
Depending on your source, and their assumptions, 1 in
ALL of these are conjectures based on assumptions, and sometimes questionable statistical applications. The values derived are for discussion. Do not use them as any sort of “fact”.
1 in 1 in
This may be the most realistic in terms of basic “life” requirements without specifying higher organisms.
The chances of intelligent life emerging is low – less than 0.01 per cent over four billion years. We may be the only case, but imposes different conditions and a definition of intelligence rather than simply life.
One of the best general discussions (including the fact that he doesn’t indulge in statistical evaluations) is by Dr. Stephen Hawking, here: