The skeleton of a rare and new dinosaur species, estimated to be 150 million years old, was just sold to an anonymous art collector. The skeleton fetched for a hefty price of $2 million — but scientists aren't happy about it.
When studying muscle strain during jaw opening in three dinosaur species, researchers found that the Tyrannosaurus rex could extend its jaw 90 degrees –- a skill that came in extremely handy for carnivorous predators.
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