Astrobiology (general): August 2016

A new method for analyzing the chemical composition of stars may help scientists winnow the search for Earth 2.0.

Why are we now? We know that the universe is roughly 14 billion years old, and that someday it is likely to end -- perhaps because of a Big Freeze, Big Rip or Big Crunch.

The long awaited second edition of the Astrobiology Primer is now published in the journal Astrobiology.

The universe is 13.8 billion years old, while our planet formed just 4.5 billion years ago. Some scientists think this time gap means that life on other planets could be billions of years older than ours.