The kangaroo has powerful hind legs, a massive tail, narrow shoulders, small, human-like hands, front paws with which kangaroos dig up tubers and roots. In case of danger, the kangaroo transfers the entire weight of the body to the tail, and then both hind legs, having freed, move with great force from top to bottom, causing great wounds to the enemy.
Interestingly, kangaroos and emu are depicted on the coat of arms of Australia because they can only move forward (this means that Australia is constantly developing).
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From @craftsman252