What wrong misconceptions were we taught as children?

Common misconceptions taught to children include the belief that humans only use 10% of their brains (debunked; we use all parts of our brain), that lightning never strikes the same place twice (it does), and that chameleons change color to blend in (they change color based on mood and communication, not camouflage). Unlearning these misconceptions contributes to a more accurate understanding of the world as we grow older.