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?
As the old saying goes, dogs are man’s best friend. Dogs perform many useful tasks—from hunting to security to helping people with disabilities. Most of us would agree that we’re just glad they’re part of the family! Where did dogs come from? How can we explain the tremendous variety of dog breeds?