A new study casts doubt on the universe’s accelerating expansion, suggesting dark energy might be weakening over time.

While none of the spacecraft have cameras perfectly designed to spot comets zipping by at speeds up to about 153,000 miles per hour (246,000 kilometers per hour), astronomers didn’t want to miss what ...

Scientists newly described how a parasitic ant queen infiltrates another ant species’ colony and tricks the workers into killing their mother.

A scientist in Japan has developed a technique that uses brain scans and artificial intelligence to turn a person’s mental images into descriptive sentences.

Archaeologists studied Semiyarka, dubbed The City of Seven Ravines, a settlement from 1600 BC that may have been a powerhouse ...

Increased solar activity causes auroras that dance around Earth’s poles, known as the northern lights, or aurora borealis, ...

Analysis of Adolf Hitler’s DNA reveals he may have had a rare genetic disorder that delays puberty, a new documentary says. Experts say that more details are needed.

Researchers have newly described three extremely rare species of toad that leapfrog over the egg-to-tadpole stage and give birth to toadlets.

A 62-page document written by billionaire Jared Isaacman outlines a sweeping, ambitious, and at times controversial plan for the space agency.

Astronomers say they spotted signs of a giant explosion releasing from a star beyond our solar system, one powerful enough to destroy a planet’s atmosphere.

Sky-gazers worldwide may get the chance to see a celestial display this week as the annual Leonid meteor shower reaches its peak.

Doctor after doctor misdiagnosed or shrugged off Ruth Wilson’s rashes, swelling, fevers and severe pain for six years. She ...