The dinosaur with 1,000 teeth is a common misconception. In reality, the dinosaur with the most teeth is the Nigersaurus taqueti, which had more than 500 teeth aligned like piano keys on the front of its vacuum cleaner-style jaw. The teeth were narrow, needle-shaped, not bigger than a few millimeters in width, and packed into an open groove in the jaw such that they were all supporting each other and growing in unison. The dental batteries erupted in unison, not each column individually, and each tooth was replaced once every 14 days.