Scientists who studied the fossilized skulls of Dunkleosteus terrelli said that this fish, which grew to 33 feet long, weighed 4 tons and lived 400 million years ago, has the most powerful jaw of any fish that ever lived:
They found that the voracious predator’s jaws snapped shut with 11,000 lbs of biting power. Channelled into the four bladed fang tips, the force was concentrated to exert an incredible 80,000 lbs per square inch.
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