(sciences) The study of life anywhere in the universe, including Earth.
Nucleic acids may not be the only biomolecules in the universe capable of coding for life processes.
(sciences) The study of life anywhere in the universe, including Earth.
Artist's impression of the extrasolar planet OGLE-2005-BLG-390Lb orbiting its star 20,000 light-years from Earth; this planet was discovered with gravitational microlensing.