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 ...

Swimmers across the country are keeping hydrated and going green with their colorful, sticker-covered Hydro Flasks.

Many animals have unique ways they have evolved to adapt to their environment. For a flying fox, which is technically a kind of bat, that means using water mid-flight to cool off. Take a look: ...