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Why Cats Lick
If you’ve ever been licked by a cat, you’ve experienced the roughness of the tongue, almost like sandpaper. A cat’s tongue is covered with barbs called papillae that face backwards and cause the rough sensation. The barbs are made of seratin, a substance found in human fingernails. The barbs serve a number of purposes. Cats […]
Are Wolves Really Our Dogs’ Ancestors
New DNA evidence seems to point to the fact that both dogs and wolves have evolved from large wolf-like canines that have been extinct for thousands of years. This could mean that while they are related, the dog’s ancestor is not the wolf. Dogs have been domesticated for thousands of years. They’ve been bred by […]