RE: Now Even Sharks are Threatened by Acidic Oceans...!

They don’t resharpen teeth. They have breakaway teeth with rows of teeth in queue. They will go through thousands of teeth over their lifetime. It’s an amazing and somewhat disturbing adaptation.

Imagine if we could be careless with our teeth. More people would open bottles with their teeth. It would be great for hockey players and fighters.

As it is, I’m frequently biting my cheeks and tongue.