Time moves differently in space. Near black holes, gravity slows clocks and stretches seconds. This explainer reveals how time bends and affects astronauts and Earth.

"Nurses kept coming by to see him because usually people don't live through his specific type of break. He had to have a halo for a while (think Regina George after the bus), and recovery was not fun, ...

A bright green fireball lit up the skies over Wellington, New Zealand, on Friday night. Scientists say it was likely a bolide ...