Ologies with Alie Ward
Castorology (BEAVERS) with Rob Rich
Rob Rich
When they rub against each other like that, it's a constantly sharpening chisel. And so the beaver's teeth are extremely sharp and constantly becoming more so. And if they don't have access to wood and don't keep gnawing and working on that, then The teeth will keep growing and can become quite a dental hazard for them. So they do require wood for that purpose as well.
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