Last season, 60 Minutes witnessed the migration of monarch butterflies. Scientists are now using tiny, solar-powered radio tags to track individual butterflies and learn more about their migration.

Add Yahoo as a preferred source to see more of our stories on Google. Scientists searching for fresh water have tapped massive reservoirs hiding in the last place on Earth people look for drinking ...

(via New Scientist) For a long time now, the idea of a fourth dimension has hovered at the edge of science and science fiction, a concept so elusive and mysterious that many of us find it almost ...