The prehistoric mammal with a tank-like shell
Evolution clearly ran out of original ideas and just decided to build an armadillo the size of a Volkswagen Beetle. Glyptodon was a prehistoric mammal entirely encased in a massive domed shell of solid bone. It waddled around ancient grasslands completely ignoring any external threats, mostly because biting into it would be the equivalent of trying to aggressively chew a bank vault.

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