Imagine horses the size of housecats. They were called Sifrhippus, and they lived 56 million years ago. Weighing in at a tiny 12 pounds and eating mostly leaves, Sifrhippus didn’t
Imagine horses the size of housecats. They were called Sifrhippus, and they lived 56 million years ago. Weighing in at a tiny 12 pounds and eating mostly leaves, Sifrhippus didn’t