Despite the trove of summer blockbusters suggesting that the greatest threats to humanity are asteroids lurking in outer space, scientists now know that an equally great threat can lie roiling under our feet. They've linked some of the greatest mass extinctions the world has ever known with rock that originated near the Earth's core and crept upward, lying in wait just beneath the surface before dousing the Earth with scalding lava.
The above story is based on materials provided by University Of Rochester. Note: Materials may be edited for content and length.
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