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"That's like setting three small cars on top of the jaws of a T. rex — that's basically what was pushing down," a researcher says. Humans bite with a measly 200 pounds of force.
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A small rock might contain tissue from a 130 million-year-old dinosaur brain. If confirmed, it would be the first bit of fossilized dino gray matter ever found.
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The horse-sized Timurlengia euotica provides a glimpse into a 20 million-year gap in fossil records, when tyrannosaurs evolved from "marginal hunters" to "apex predators."