Cats\nA cat has 32 muscles in each ear. All the better for them to eavesdrop on your conversations and plot your demise.\nElephants\nElephants can smell water up to 3 miles away. They are also one of the three mammals that undergo menopause the other two being humpback whales and human females.\nBeavers\nBecause beaver's teeth never stop growing, they must constantly gnaw on objects to keep them at a manageable length. Their teeth would eventually grow into their brain if they didn't maintain them.\nTurtles\nYou can tell a turtle's gender by the noise it makes. Males grunt and females hiss.\nGiraffes\nGiraffes have no vocal cords and their tongues are blue-black in color.