Building blocks of life have been found on this moon of Saturn. They may come from chemical reactions beyond Enceladus’ possible life-supporting ocean.

A reptile fossil is the first of its kind with skin and partially webbed feet, possibly showing how later species like plesiosaurs adapted to water.

That can lead to weight loss, despite an unusually high intake of fat. Such results may explain why so many Americans have tried the keto diet on for size. “I think a lot of people look at a ketogenic ...

Demonstrated in rabbits, the 3-D printer might someday print bone grafts directly onto fractures, complete with antibiotics to ease healing.

The Big Bang may have spawned these theoretical black holes, whose lives are thought to end in a burst of extremely energetic particles.

Nancy Shute discusses the troubling rise of cancer among younger adults, and shares a glimmer of hope for those diagnosed in early childhood.

At just 25, Cecilia Payne-Gaposchkin applied quantum physics to a treasure trove of astronomical observations to show that stars are mostly hydrogen and helium.

Results from a large trial suggest baxdrostat could provide a new option for people whose blood pressure remains high despite standard treatment.

Bats can carry some deadly human pathogens without signs of illness. A new survey shows that other viruses can still be bad for bats.

A spacecraft slowly descends to the surface of Mars. Once arid and lifeless, the Red Planet is now lush and green. As a city comes into view, passengers see people strolling along busy streets, ...

Saving reproductive tissue from kids treated for cancer before adolescence could give them a chance at having biological children later in life.

Vaccination is still important to ward off the worst of the coronavirus. Three experts discuss the concerns with restricting access.