Usually these root vegetables cause pink stains, but with a little bit of chemistry, Brazilian researchers found they could produce another hue.

Working in South Africa, she led studies and drug trials, hoping to overcome not only H.I.V. but also cultural barriers to stopping its spread. She died of the coronavirus.

One of the top allergists of the 20th century, he helped legions of hay fever sneezers by publicizing pollen counts. Among his patients was Saddam Hussein.

The elusive South Philippine dwarf kingfisher is difficult to photograph, and there were no known photographs of its fledglings.

In his “bizarre niche” of science, he sought to weaponize odors as a means to sniff out disease, even using dogs to do so.

Scientists have persuaded Britons and Israelis to fill out questionnaires about their health, to get ahead of the coronavirus by getting resources to the right place. The U.S. is next.

Never before, scientists say, have so many of the world’s researchers focused so urgently on a single topic. Nearly all other research has ground to a halt.

Before this underwater forest disappears, scientists recently raced to search for shipworms and other sea life that might conceal medicine of the future.

A database of daily fever readings shows that the numbers declined as people disappeared indoors.