Water scarcity is not a 21st-century phenomenon. Though there have been many water-related problems linked to global warming, many places in the world have suffered without water even centuries ago. The Mayan civilization was one of them.
A third of the Earth's biggest groundwater basins are in trouble, because after significantly relying on this hidden resource for so long, they are being quickly tapped out, according to two new studies.
A massive magma reservoir has been discovered 12 to 28 miles beneath the Yellowstone supervolcano, and it is 4.4 times larger than the shallower, long-known magma chamber, according to new research.