A January executive order by President Donald Trump designates people as female if they make the “large” reproductive cell (the egg) and male if they make the ...

Editor in Chief Nancy Shute discusses the centennial of quantum mechanics’ framework, Hubble’s 35th anniversary and the legacy of Kanzi the bonobo.

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

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

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 ...

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.

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

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

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

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

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 ...

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