Rare Asian elephant birth at Smithsonian's National Zoo marks first new calf in nearly 25 years, offering new hope for ...

That these cognitive skills — incongruity resolution and insight into others’ minds involved in teasing — appear before a ...

This Nov. 2005 file photo shows future parents awaiting the arrival of their first child in Carlsbad, Calif. When you're expecting a baby, you hope nothing goes wrong. But at least one in 20 pregnant ...