Behind closed doors with the experts who study the end of the world—and what they know about humanity’s capacity for survival ...

Cosmic “touchdown airbursts” — explosions of comets or asteroids above Earth’s surface — may be far more common and ...

Now in its ninth year, our annual poll showcases 255 vital video essays, nominated by 72 international voters.

“This process can be likened to a bottle of sparkling water containing dissolved volatiles that exolve when the bottle is ...