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T. Rex killed by pigeon parasite?

New research has shown that lesions on the famous Tyrannosaurus Rex skeleton known as “Sue” were not caused by bites from another T. Rex, but rather were made by an ancient version of trichomonosis, a parasite that infects modern birds.

In birds, trichomonosis causes inflammation in the beak and upper digestive tract, which makes feeding and even breathing very difficult.

Birds’ bodies react by sealing off infected tissue, but over time byproducts from this immune response can damage bone, creating lesions.

Sue had about ten such lesions on her jaw, some of them large enough for a human adult to poke a finger through.

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