The building blocks of life on Earth may have been fueled by tiny sparks hopping between water droplets.

Next to it, a much smaller sphere shows the world's liquid fresh water. This image shows blue spheres representing relative amounts of Earth's water in comparison to the size of the Earth.

Scientists reveal water formed soon after the first supernova explosions, suggesting life-friendly conditions existed earlier ...

Here on Earth, we tend to take showers for granted ... Astronauts perspire just as much as us earthlings do. Worse, sweat, like water, sticks to their bodies, clumped into spheres and held together by ...