While bats live in air and dolphins live in water, both use a biological form of sonar technology called echolocation to see with sound! The specifications in dolphin and bat biosonar systems are so many, so well-integrated, and so precise, could they really have developed at random in two completely different environments?
Ice sheets, saber-toothed tigers, and wooly mammoths—the Ice Age sounds like a cool time! But what caused it? And was there more than one Ice Age?