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.
Life may not have begun with a dramatic lightning strike into the ocean but from many smaller "microlightning" exchanges ...
A massive 'gravity hole' pulling down the Indian Ocean has stumped scientists for years, but the mystery may have just been ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results