It is widely believed that Earth’s atmosphere has been rich in oxygen for about 2.5 billion years due to a relatively rapid ...

It was estimated that about 490 million cubic meters of volcanic ash would have to be removed from the greater Tokyo metropolitan area, or roughly 10 times the amount of debris that had to be ...

Researchers from the University of Tokyo provide a mechanism to explain precursor oxygenation events “whiffs,” which may have ...

The active Mount Sakurajima volcano in Kagoshima erupted in a spectacular Valentine's Day display on Feb. 14, spewing plumes of ash 5,000 meters into the air. According to the Kagoshima ...