Days in winters are short because of Earth’s tilt. Learn why sunlight lasts less time, nights grow longer and the Winter Solstice happens.

SQUIRE aims to detect exotic spin-dependent interactions using quantum sensors deployed in space, where speed and ...

Ahead of 'The War Between the Land of the Sea', we look back at a drama that rewrote the rules of the Whoniverse.

Our planet’s magnetosphere has seen dramatic shifts across its history—even total reversals—but this recent wrinkle doesn’t ...

These 80 space trivia questions are great to play with friends, challenge your family with or play by yourself. See how much ...

Fresh evidence suggests early Earth wasn’t locked under a rigid stagnant lid but was already experiencing intense subduction.

Get them a National Geographic science kit. A ton are on sale at Amazon right now, and most are 30 percent off. I think the ...