Nobody has yet seen an extraterrestrial, but scientists have found

[University]

Nobody has yet seen an extraterrestrial, but scientists have found clues that life may be quite common in the universe.

So what areas of scientific study are included in the new disciple of "astrobiology"

 

[Chronos]

Kepler is the newest breed.

 

[Arch2008]

http://astrobiology.nasa.gov/

 

[Chronos]

Thanks arch! I omitted link.