Hundreds of millions of years ago, mysterious life forms called Prototaxites towered toward the sky. Believed to be the first giant organisms to thrive on dry land, some species of Prototaxites grew up to 26 feet (8 meters) in height and resembled tree trunks composed of tiny interconnected tubes. Their position in the greater tree […]
Humans Lost the Ability to Swivel Their Ears—But These Vestigial Muscles Still Twitch
Tens of millions of years ago, our ancestors could swivel their ears to pick up sounds, much like cats and dogs do today. Humans lost that ability over time, and the muscles that once controlled ear movement are now mostly useless—except for a few people who can still wiggle their ears. But new research shows […]