Nearly 660 kilometers (410 miles) beneath Earth's surface lies one of the planet's most important internal boundaries. Known ...

The first half of 2026 has delivered the same cocktail as 2025—everything is shaken, but little is really stirred.

A version of this essay appeared on Matthew Yglesias’ Slow Boring, a site dedicated to offering pragmatic takes on politics ...

Depending on the type of intersex variation someone has, it could alter their chromosome makeup, genital appearance, hormonal balance, and more. Share on Pinterest Maskot/Getty Images We’re born with ...

By modeling dehydration-driven fluid pressure, a new study links deep fluids to where megathrust earthquakes end and slow slip begins.