In June, 1991, Mount Pinatubo in the Philippines exploded, blasting millions of tons of ash and gas over 20 miles high - deep into the stratosphere, a stable layer of our atmosphere above most of the clouds and weather. Certain ...
Aug 07, 2015 in Earth Sciences
Nearly 325,000 people could be affected by an eruption of Cotopaxi, the volcano looming beyond the Ecuadoran capital of Quito, officials said Monday.
Aug 17, 2015 in Earth Sciences