This 236-Million-Year-Old Fossil Just Changed the History of Birth!

An amazing fossil of a mammal ancestor suggests these ancient creatures were giving birth to live babies instead of laying eggs way earlier than we ever thought. By studying the fossil's tiny teeth, researchers found a special growth line that shows the baby was born big and strong, just like modern mammals today. Imagine a furry, dog-like creature cuddling its newborn babies millions of years before the first T-rex even walked the Earth!