This discovery should give us new clues about the origin of the Earth's oceans. Some scientists theorize that most of the water came from comets that collided with Earth, but this new discovery could bolster the theory that claims that the water came from the planet's interior.
How can we know what's this deep inside the Earth? It's possible, with seismometers, to study the seismic waves created by earthquakes, and with the right algorithms, it is possible to determine what materials those waves passed through. Do that for hundreds of earthquakes from thousands of differen...
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