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POPSMass extinctions? Blame it on the ocean In the course of hundreds of millions of years the world's oceans have expanded and contracted in response to the shifting of the Earth's tectonic plates and to changes in climate. There were periods of the planet's history when vast areas of the continents were flooded by shallow seas such as the shark and mosasaur infested seaway that neatly split North America during the age of the dinosaurs. As those epicontinental seas drained, animals like mosasaurs and giant sharks went extinct, and conditions on the marine shelves where life exhibited its greatest diversity in the form of things like clams and snails changed as well.
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POPSEcuador's "Throat of Fire" begins erupting Tungurahua, which means "Throat of Fire" in the native Quichua language, is 80 miles south of the capital, Quito. It last erupted in August 2006 and has been rumbling and belching rock, gas and ash since January.
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POPSSurprising Activity Discovered at Yellowstone Supervolcano What the researchers think is happening, on a short-term basis at least, is that the bulging Yellowstone hotspot north of the Tetons is pushing against the north edge of Jackson Hole and jamming it against the mountains. (This is also causing the southwest part of the Yellowstone plateau, under the hotspot, to slide downhill at a rate of one-sixth of an inch each year.).
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POPSThera eruption was bigger still Some scientists have suggested that the eruption may be connected to the decline of the Minoan people, an ancient sea-faring civilisation living on nearby Crete. Others have even tried to link the event to the legendary disappearance of the island of Atlantis.
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POPSUnderwater volcano discovered off Sicily The Italian scientists who discovered the volcano have named it Empedocles. The volcano's base covers an area larger than Rome, and it's higher than Paris' Eiffel Tower with one peak only seven metres below the sea's surface.
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