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?
Genesis 10 documents about 70 different language families in its Table of Nations. About how many language families are there today? How does science confirm the number?