Mount Everest Is Not the World’s Tallest Mountain

If someone asks you “What is the tallest mountain in the world?” you’d probably answer, “Why, Mount Everest, of course — everyone knows that.” Sadly, you would be wrong. Technically, Mount Everest is the tallest mountain above sea level, but it isn’t the tallest in the world. That honor goes to Mauna Kea in Hawaii. Mauna Kea rises up 13,796 feet above sea level (compared to Everest’s 29,035 feet), but it also extends down an additional 19,700 feet below sea level into the Pacific Ocean. That makes it the world’s tallest mountain as measured from base to peak.