Why do some animals burrow?

Dawn learns that living in an oversized burrow is not the best home for a hippo. Kids have fun burrowing in popcorn with popsicle sticks. To watch more kids .\r
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This is episode 1 of The Burrowers: Animals Underground, a series looking at how Badgers, Water Voles and Rabbits live underground using replica burrows to .\r
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Feeling claustrophobic? Steve Leonard crawls down a wombat burrow to discover more about this Extreme Animals main defence tactics. Watch out, they may .