Earth

These amorous creatures could put Casanova to shame—from beguiling dancing seahorses to peacocking spiders

Fiber optics that connect the world can detect its earthquakes, too

The Hayli Gubbi volcano, long thought to be dormant, sent ash nine miles into the sky in an eruption on Sunday

These valuable but difficult-to-extract metals are increasingly important to modern life

Thousands of years ago, a space rock hit what is now China, leaving a bowl-shaped crater some 900 meters wide

Bird flu surges and a government shutdown collide, complicating efforts to track cases and protect flocks.

Camels in ancient Arabia may have led hunter-gatherers through deserts once thought uninhabitable

The lowdown on the Environmental Protection Agency’s move to repeal of the “endangerment” finding. Also, how did a juicy ketchup ingredient help create a starchy tuber?

Water usually flows downward, but something strange happened under Greenland’s ice sheet when a deluge punched through the surface to scour an area nearly twice the size of New York’s Central Park

Set your alarm on Wednesday to see some of the summer’s stunning meteor showers.

Think: subzero temperatures, bone-rattling storms and mysteries about the future of our planet under the ice.

The park’s newest hydrothermal feature has an otherworldly milky texture from dissolved silica