The massive Olympus Mons volcano on Mars—one of the solar system’s highest peaks—may have towered above a Martian ocean in the distant past, a new study suggests. The research identifies an escarpment ...
Millions of people around the world live near one of the roughly 1,500 active volcanoes on Earth—from Italy’s Campi Flegrei to Indonesia’s Merapi to the United States’ Mount Rainier. While that may ...