Insects are everywhere! They’re found on every continent including Antarctica, and nearly a million species of insects have been discovered! Since new insects are being discovered all the time, scientists suspect that millions more are just waiting for us to find them. You’ve probably seen plenty of insects in your life – bees, ants, butterflies, beetles, and mosquitoes – and you may even know that all insects have six legs. But do you know why we don’t have giant insects? The secret is in how they breathe!