Jaguars still have connected habitat in South America, but many populations elsewhere face growing isolation and weaker links.

How does the brain juggle so much information? A mouse study suggests neurons can switch jobs as memory demands change.

Three women astronauts use Instagram to blend science with personal stories, pop culture and fashion while challenging STEM ...

Greenland and Antarctica lost 12.5 trillion tons of ice between 1979 and 2023, and 84% left through faster-flowing glaciers, ...

Sex chromosomes do more than determine biological sex. Their genes may shape how the brain, immune system, heart, and cancer change with age.

Disasters don't always bring more hunger. In 87 countries, good government, varied food sources and growth came with smaller ...

Ancient ice cores from Tibet’s Guliya Plateau preserve a climate record stretching back 128,000 years, offering a rare ...

Aspirin may affect dementia risk differently depending on a person’s genetic profile, but researchers caution that it can ...

For millions of years, three colors of wall lizards lived in harmony. Now, a new, aggressive green lizard is destroying this ...

A global analysis of 93 countries reveals surprising links between cat populations, Toxoplasma gondii exposure, and national ...

A volcano that has been silent since about 1550 began erupting after a big quake. A radar satellite recorded its lava spreading, twice every 12 days.

A small study found that adding broad-spectrum incandescent light to an LED-lit office improved workers' color vision.