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Ancestors of T. rex and other tyrannosaurids had larger arms, so there’s a clear evolution in the fossil record showing that some selective pressure pushed tyrannosaurid forelimbs to shrink.
The characteristic small arms of the T. rex might have been used to help them in the throes of passion. Scientists in Argentina have discovered a new species of dinosaur predator that has similar ...
The precise purpose of T. rex’s relatively tiny arms has long been mysterious. Over the years, scientists have suggested that they might have been used to grasp struggling prey, to help resting ...
Perhaps, he thought, the arms shrank to get out of the way during pack feeding. T. rex youngsters, in particular, would have been wise to wait until the larger adults were finished.
T-Rex has two claws on the arms that Stanley says would have helped the creature exert up to 50% more pressure in clawing and slashing. The normal number of claws on for theropods was three.
For many years, it was assumed that the T-Rex's tiny arms were merely an evolutionary holdover, much like a human's wisdom teeth or the wings on certain species of flightless birds. Over the years ...
The T.rex's short arms were a natural evolutionary process that helped prevent their accidental amputation, says Padian's theory, based his story on existing knowledge of T.rex's social structure.
While T. Rex’s stubby appendages might look wimpy, he explained, they were still extremely strong. Keep in mind that T. Rex towered about 18 feet tall, so this “tiny” arms are actually about ...
A 45-foot-long T. rex, for example, might have had a 5-foot-long skull, but arms only 3 feet long -- the equivalent of a 6-foot human with 5-inch arms.
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