Famous oddball quasar isn't X-ray weak after all, astronomers say

Grand Canyon rocks preserve a 1.2-billion-year record of Earth–Moon interactions, allowing scientists to trace how the Moon's orbit and Earth's rotation have evolved over deep time.

How tiny balls of human brain tissue are revealing the causes of childhood epilepsy — and possible treatments

Thawing permafrost is turning Arctic rivers orange, with researchers finding waters more acidic and metallic than mine drainage