Chinese scientists tested a provocative military scenario: the effects of three rapid nuclear strikes on the same target.

The Big Bang may have spawned these theoretical black holes, whose lives are thought to end in a burst of extremely energetic particles.

CAPE CANAVERAL, Fla. (AP) — Scientists have discovered a gamma ray explosion outside our galaxy that’s not only exceptionally powerful, but also long-lasting. Telescopes on Earth and in space — ...