I was wondering if large animals could possibly dig extensive burrows for themselves to live in. The polar bear burrows, but snow is not dirt. The aardvark goes about 4' long, ~150 lbs: similar to a sheep. I think the aardvark might be the biggest dirt-burrowing animal, the only sheep-sized burrower.
I wonder why.
Is there anything special about the aardvark that at its size it burrows, while other burrowers are smaller?