Ice ages reshape the planet—but they don’t come out of nowhere. From orbital shifts to atmospheric changes, here’s what actually causes Earth to freeze.

"It could represent some of the oldest and most pristine water ever observed, formed in another planetary system and preserved throughout its interstellar journey." A team of scientists has found the ...

Although I'm sure many of us have heard the phrase "ice age," what exactly does that mean? Is it true we're in an ice age right now? Today we're exploring questions like these to better understand ...