When seawater gets cold, it gets viscous. This fact could explain how single-celled ocean creatures became multicellular when the planet was frozen during “Snowball Earth,” according to experiments.

Post-workout cold plunges may be having a moment, but a new study dunks on the practice. After a tough workout, muscle recovery was no better in women who immersed themselves in chilly water than in ...

Sign up for CNN’s Fitness, But Better newsletter series. Our seven-part guide will help you ease into a healthy routine, backed by experts. A systematic review of ...

Dr. Mark Harper recalls his first cold-water swim in the south of England 20 years ago. It was August, but the initial jolt from the plunge took his breath away. The shock to his system lasted a ...

Cold-water swimming is surging in popularity, particularly in northern Europe, where groups such as the BluetitsChill Swimmers eschew tropical beach vacations in favor of frigid winter dips. Celebrity ...

Cold water therapy, an ancient practice now modernized, offers a refreshing path to dermatological wellness. By constricting blood vessels and boosting circulation, it reduces inflammation and pore ...

The authors do not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and have disclosed no relevant affiliations beyond their ...

A science video maker in China couldn’t find a good explanation for why hot and cold water sound different, so he did his own research and published it. By Sam Kean Most people are quite good at ...

In the light of the setting sun, the water lapping against the rocky shore glistened like freshly spilt ink. Despite the fact that it is frigid to the touch, this cold environment is home to a wide ...