Photographing them can help us determine if there was ever enough water on Mars to sustain life. These Martian "kidney beans" aren't safe to eat: they're actually frozen sand dunes in Mars ...

Whether you enjoy camping off-grid or you're constantly running around the city, a filtered water bottle can help you stay hydrated. A good filtered water bottle is an easy and eco-friendly way to ...

Kentucky cave explorer Floyd Collins went underground—and didn’t come out. The epic effort to rescue him gripped national ...

Water retention is when fluid builds up in part of your body. It is also called fluid retention or edema. It can affect body tissues outside of blood vessels, leading to swelling or bloating. Water ...

Water polo was initially a dangerous sport that first developed in the rivers and lakes of mid-19th century England as an aquatic version of rugby. In 1870, the London Swimming Association developed ...

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When something is hydrophobic, it repels water. When water is dropped on a hydrophobic surface, rather than spread out over the object, the water forms droplets. Some plants, animals, and insects have ...