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?
Nearly 5 million people from all over the world visit the Grand Canyon in Arizona every year. Many believe that this 277-mile long gorge had formed over millions of years, but another famous North American landmark shows that the Grand Canyon could have been created much faster and not long ago.
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