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? Learn more about echolocation here: http://www.icr.org/article/dolphin-dna-reflects-bat-echolocation | Institute for Creation Research (ICR)