Metal-rich asteroids could one day become hardware stores for Mars, supplying the materials needed to build and repair a growing

A new wearable patch may help people reach REM sleep faster and remain there longer without medication or surgery. In

Earth’s molten iron core unexpectedly reversed direction beneath the Pacific, revealing a dramatic change in the hidden engine that creates

Millions of sperm do not always compete alone—some species send them into action as coordinated teams. A sweeping evolutionary study

Genetic changes may set off a chain reaction that causes the spine’s natural shock absorbers to harden and deteriorate. Zebrafish

A long-term brain study found that common risks such as smoking, high blood pressure, heart disease, and high blood lipids

A new hollow nanoreactor mimics living cells to make hydrogen peroxide more efficiently using visible light. Its light-trapping cavity and

A supermassive black hole has been found lurking about 30,000 light-years from the center of its galaxy—the first dormant black

A spectacular fossil site in Canada contains 567-million-year-old creatures that may represent some of the earliest animals to move, reproduce

A mathematician working at Anthropic says he used the AI model Claude Fable 5 to uncover a remarkably simple counterexample