Is "Mount Everest is the tallest mountain on Earth" still taught in school?
Everest is the highest mountain above sea level, but Mauna Kea in Hawaii is taller when measured from its base on the ocean floor. The difference depends on how "tallest" is defined.
What you were taught
Mount Everest is the tallest mountain on Earth
What we know now
Everest is the highest mountain above sea level, but Mauna Kea in Hawaii is taller when measured from its base on the ocean floor. The difference depends on how "tallest" is defined.