EyeInHand on Nostr: Ever wonder how beavers can chew down large trees? Cross section of a beaver skull ...

Ever wonder how beavers can chew down large trees? Cross section of a beaver skull shows huge teeth. These teeth never stop growing, so they chew constantly to wear them down.

How do the teeth stay sharp? Beavers absorb iron from the water, which binds to their teeth and makes them stronger.

BUT only on the front side! The rest of the tooth wears faster than this iron layer, leaving a razor sharp cutting edge that stays sharp as the teeth wear down.

via Southern Piedmont Natural History