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.

There are times when you look in the mirror in the morning and suddenly feel as though your facial skin has sagged downward. Observing nasolabial folds stretching vertically above and below the ...

Gravity, in the literal sense, keeps everyone (and everything) on Earth grounded. It acts as the anchor that prevents objects ...