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

Scientific information on the US Centers for Disease Control and Prevention’s website was replaced on Wednesday with anti-vaccine talking points that don’t rule out a link between vaccines and autism, ...

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 ...

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

The terms “gender ideology” and “transgender ideology,” have become ubiquitous — in government documents and policy announcements, in mass media and in online disputes.

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

On a cool November night in 1999, dozens of transgender people and their friends stood thousands of miles apart in Boston and San Francisco. They lit slender candles and spoke into the surrounding ...

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.

The longstanding public health practice of adding fluoride to community drinking water is facing heavy scrutiny in the United States over questions about whether the benefits outweigh the potential ...

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

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.

Scientists have recovered RNA from a mammoth carcass preserved in permafrost for 40,000 years. The ancient molecules reveal details about the creature’s last moments.