Cesium 134 and cesium 137: The two isotopes that were released into the Pacific Ocean when an earthquake ruined the Fukushima Daiichi nuclear power plant on the eastern coast of Japan in 2011. The panic over the leakage was instantaneous in the US—but a new study shows how long it really took.
The world didn't break out in earthquakes but Grímsvötn, a volcano in Iceland, exploded over the weekend. The volcano sent a plume of ash and smoke nearly 8 miles high. Um, that's so huge you can see it from space.
Thanks to new measuring techniques, geophysicists have discovered that the underground plume that feeds Yellowstone's Supervolcano is much, much larger than we thought. What was once assumed to be an already large 150 miles long is now a gigantic 400 miles pool of molten rocks and hot briny water for the Volcano to…