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.
The mantle transition zone (MTZ), which occurs 410–670 kilometers below Earth's surface, may store several oceans' worth of water. This water, which is carried to such depths by subducting tectonic ...
Scientists reveal water formed soon after the first supernova explosions, suggesting life-friendly conditions existed earlier ...
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