Sea glass, while an eye-catching treasure and a multimillion-dollar industry, exists because of decades of improper waste management.

Pinpointing when animals first appeared on Earth is like finding a needle in a very old, planet-sized haystack. A new study narrows the search.

The erosion of layers of rock by rivers in the Appalachian Mountains generates biodiversity of freshwater fish species, a study suggests.

Some rocks will burn, and others will melt, depending on how they were formed and what minerals they contain.

"Think of it as Earth's skin," says Jon Chorover of the critical zone. "It's sometimes termed the zone where rock meets life."

Nature begins forming patterns at the molecular level – and sometimes they grow to enormous sizes.

Simulated Mars dust and titanium alloy combine to make a 3D printed material that could one day become tools or rocket parts on Mars.

A biologist explains how researchers nail down the age of ancient fossils thanks to a physical process called radioactive decay.

The joke that sparked a violent reaction from actor Will Smith at the Oscars centered on his wife, Jada Pinkett Smith’s hair loss. A dermatologist explains the causes and treatment for alopecia.

"Our theory has the potential to address not just how Earth became habitable, but also why life emerged on it," researchers say.