Scientists recently discovered almost 100 'new' volcanoes under the ice.
Fossil evidence forces major rethink of how and when humans arrived in Southeast Asia.
Communities living near the 'Volcano of Fire' are on standby as ash continues to shoot into the sky, raising fears of a massive eruption.
Italy's supervolcano appears to have been building energy over the last 60 years—and it could be ready to erupt.
Experts from U.K. and Japan warn that Sakurajima volcano could have its first major eruption since 1914.
Prime Minister Shinzo Abe, who returned from the United States on Saturday, said he had ordered the military to help in rescue efforts