Yale Environment 360: A massive underwater volcano the size of New Mexico has been discovered 1,000 miles east of Japan, Nature Geoscience reports. Covering an area of 120,000 square miles, the volcano is 50 times larger than Hawaii's Mauna Loa, making it the largest volcano on Earth, according to a team of researchers from the U.S., Japan, and the U.K. The newly discovered volcano, named Tamu Massif, is only 25 percent smaller than the immense volcano on Mars, Olympus Mons, which is large enough to spot with a backyard...