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 ...

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

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 ...

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 ...

Key Takeaways Kissing may date back 21.5 million years in early ape ancestorsResearchers studied modern primates to estimate ...

The long-awaited photos, snapped by multiple NASA spacecraft between September and mid-October, show a tiny, glowing orb ...

Key Takeaways A new flu variant, called subclade K, is spreading internationallyU.S. flu vaccinations are over 2 million ...

By Nathan Layne and Jayla Whitfield-Anderson LAFAYETTE, Georgia (Reuters) -In a brightly lit, mostly packed meeting hall in ...

Ex-U.S. Treasury Secretary Larry Summers announced he will resign from the OpenAI board following intensified scrutiny over emails between him and Jeffrey Epstein ...