Ayatollah Khamenei’s fatwa against nuclear weapons was cited in international negotiations, referenced by Western analysts, and treated by some governments as genuine evidence that Iran would not ...

It's far from clear if the weather is planning to cooperate, but spring arrives — technically, at least — Friday.

Robert Goddard, assisted by his wife Esther, sent the first liquid-fueled rocket aloft on March 16, 1926. When you purchase ...

The asteroid impact that wiped out the dinosaurs didn’t keep life down for long. New research shows that microscopic plankton began evolving into new species within just a few thousand years—and ...