For some social birds, raising their young or finding food is a group effort. Learn more about cooperative bird behavior.

New clues from the day the dinosaurs died. A mysterious ancient human tooth. Primordial galaxies. See how the past year ...

Fans of the Wicked stage musical know the “As Long As You’re Mine” staging well: Elphaba and Fiyero kneeling and wailing right into each other’s faces for 3 minutes and 46 seconds. It’s a steamy and ...