Quote:
Originally Posted by Street Pharmacist
Why is it highly likely? And what is "earth-like"
Smarter people than me are optimistic, but there's so many things that make earth unique beyond temperature and water composition (magnetic property, earth core tectonic plates, moon-tidal system, etc) I'm not sure you can just "math" an estimate
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I would assume 'earth-like' means a moderate temperature that sustains mass amounts of free-flowing water, rocky land elements, and a oxygen/nitrogen atmosphere. Any planet with all of that, it must almost be a certainty to contain some kind of life.
The other things you list, I figure that would lead in to the "evolving into intelligent life" category, and would be a much smaller figure.