A new fossil and DNA analysis traces how dozens of sloth species responded to climate shifts and humans. Just two small tree-dwelling sloths remain today.

Pruney fingertips aren't swollen sponges — the wrinkles actually come from blood vessels constricting and pulling skin inward.

You lay a plastic sheet on the mud. Then you lay your body upon the sheet. Without any direct contact between mud and body, you spend several minutes enjoying the soft and saunalike heat, sweating all ...

Scientists suggest the missile defense plan will face big hurdles, especially given its projected timeline and cost.

The person who received the bladder is doing well, and the successful transplant could offer hope to thousands of people with bladder dysfunction.

Penguin poop provides ammonia for cloud formation in coastal Antarctica, potentially helping to mitigate the impacts of climate change in the region.

Screening for osteoporosis is recommended at age 65, but experts say women should be proactive about bone health long before that.

The AI tool used machine learning to outperform current weather simulations, offering faster, cheaper, more accurate forecasts.

In a first-of-its-kind test, scientists used a levitated magnet to search for dark matter, the unidentified substance believed to be present throughout the cosmos. If dark matter is made up of ...

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With greater control over the quantum realm, physicists are poised to make major leaps in quantum computing, quantum gravity and more.

Experts explain the science behind Biden's advanced prostate cancer diagnosis, including how common it is and what treatments are available.