True: Sea otters have a favorite rock they use to break open food., The blue whale is the biggest animal to have ever lived., The hummingbird egg is the world's smallest bird egg., It takes a sloth two weeks to digest a meal., The largest living frog is the Goliath frog of West Africa., False: Sharks are mammals., Pigs roll in the mud because they don’t like being clean., Bats are blind., A dog sweats by panting its tongue., An ant can lift 1,000 times its body weight.,

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