Monarchs west of the Rocky Mountains make up the “western population,” with most heading to California and some continuing ...

A groundbreaking study has traced the 66-million-year evolutionary history of primates and overturned conventional thought that our ancestors originally inhabited warm tropical forests. Using advanced ...

In an early sign of the winter weather that's coming, the dreaded polar vortex is making news yet again. The polar vortex is "ramping up from its summer slumber," said meteorologist Judah Cohen in an ...

The cold water upwell, which is vital to marine life, did not materialize for the first time on record. Researchers are trying to figure out why. By Sachi Kitajima Mulkey Each year between January and ...