RE: Scientists: 100 million worlds may have complex alien life in our galaxy
June 9, 2014 at 2:48 pm
(June 9, 2014 at 2:22 pm)Tonus Wrote: How long after the big bang were there planets that could host life?
That's an unknown - however, it *is* known that there are stars like(*) our own that are significantly in excess of ten billion years old.
(*) "like" is a very relative term. I'm speaking of main-sequence stars that are metal-rich enough to suggest that their system could support complex organic chemistry, that are neither too small/dim nor too large/bright/short-lived.




