This ancient crocodile relative grew up on four legs then walked on two

Scientists have mapped how Earth’s deepest mantle is being deformed—and the results point to long-lost tectonic plates buried thousands of kilometers underground. Using a massive global dataset of seismic waves, they found that most deformation happens in regions where these ancient slabs are thought to reside. The findings confirm long-standing theories but, for the first time, show the pattern on a global scale. It’s a major step toward understanding how the planet’s interior slowly churns ove

A remarkably preserved, mummified reptile from 289 million years ago is rewriting what we know about how animals first breathed on land. This tiny creature, Captorhinus aguti, reveals the earliest known version of the rib-powered breathing system used by modern reptiles, birds, and mammals — a crucial innovation that helped vertebrates thrive outside water.

Seasonal fires have darkened skies over Southeast Asia.

Modern medicine has played a significant role in improving the length and quality of our lives. While many treatments may seem like miracles, they are the result of a lengthy, rigorous research process. Drug discovery is a particularly time-consuming and costly activity that is fraught with complex challenges and labor-intensive bouts of trial and error.