Explore 25 chemical reactions that broke reality, challenging science and reshaping our understanding of the universe.

Scientists at Cornell University may be closing in on the long-sought “holy grail” of male contraception: a safe, reversible, nonhormonal method that completely halts sperm production. In a ...

The furan heterocycle is a dienic reagent particularly suitable for the Diels-Alder reaction and maleimides represent a typical family of complementary reagents because of their strong dienophilic ...

A young Iranian protester shouts anti-U.S. and anti-Israeli slogans during an anti-war protest against the U.S. and Israeli military attacks, in Tehran, on Feb. 28, 2026. Reporter World leaders ...

Many runners feel aches here and there and, most of the time, with good strength training, nutrition and recovery, the discomfort can addressed. However, when the discomfort is caused by a bone stress ...

Many runners feel aches here and there, especially as mileage increases. And most of the time, with rest, strength training, and recovery practices, you can address the discomfort But the type of ...

Posterior reversible encephalopathy syndrome is a neurological disorder characterized by swelling or inflammation in the brain. It’s often treatable if diagnosed quickly. Posterior reversible ...

According to the attendees taking to social media to share their early reactions ahead of the movie’s June 13 premiere in theaters, How to Train Your Dragon is as ...

This series was created for Google, the Buck Institute, Optispan and Phenome Health by Scientific American Custom Media, a division separate from the magazine’s board of editors. For most people, ...

Drug reaction with eosinophilia and systemic symptoms (DRESS) is a T-cell–mediated severe cutaneous adverse reaction characterized by rash, fever, internal organ involvement, and systemic ...

WASHINGTON — Reaction Engines Ltd., a British company that has worked for decades on an air-breathing rocket engine for spaceplanes and other hypersonic vehicles, has filed for bankruptcy. The company ...