The shape and size of the continents has changed a lot over the history of our planet. Sea levels have changed, plates have drifted, and in all the upheaval some large chunks of land have gone missing. Now geologists think they've found one -- a lost chunk of continent (otherwise known as a microcontinent) called Mauritia, which once connected India and Madagascar, before sinking deep under the Indian Ocean.
To find the continent, scientists dove deep down into the ocean and found a lost world, complete with mer-dinosaurs and other weird creatures. We wish. Actually, they analyzed some sand.