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A Milky Way companion galaxy named Aquarius IV lies about 355,000 light-years away. A Yale-led team found it in Rubin test data covering about 7 percent of the night sky.

Cancer cells that survive chemo swell into giant senescent cells that summon immune repair, and drugs that block their IAP proteins kill them.

America’s electricity demand is rising, but power line construction is lagging. A new analysis examines the barriers and possible solutions.

A new study reveals how genes influence German Shepherd behavior, with working dogs showing greater curiosity and fearlessness.

Models of the deep chemistry of Uranus and Neptune find far more oxygen inside Neptune, a sign the two grew from different parts of the disk.

Berlin’s red squirrels show subtle genetic differences across nearby green spaces, raising questions about how freely they move through the city.

Capotauro, a candidate early galaxy, moved 0.13 arcseconds in 3.5 years. Astronomers now say it is a cold brown dwarf in the Milky Way.

Flounders in a Finnish lake appear to spend their entire lives in freshwater, raising questions about how they reproduce without the sea.

U.S. teenage boys’ outdoor time fell from over an hour a day around 2010 to under 40 minutes by 2023, while girls’ outdoor time changed little.