Ever since the days of the Greeks, people have tried to prove that thriving civilizations once existed on huge islands that have since sunk beneath the sea.
Even at an early evolutionary stage, bird-like dinosaurs occupied different niches in the same ecosystem,
Dung beetles use light from the MIlky Way to find their way
Recently identified subspecies ranges farther than first imagined: across Africa.
An archaeologist ponders the fate of Hoover Dam