T. rex had a skull so hard that even T. rex could not break it, say the scientists

An adult Tyrannosaurus rex – the most biting land animal ever known – had a maximum bite force of nearly 12,800 pounds. It's about 13 Steinway, model D, devastating pianos that ravage prey, so powerful that scientists have been baffled by the way the beast has not broken his own skull. But new evidence appeared Wednesday suggesting a simple answer: T. rex is just this hard core.

According to new research from the University of Missouri, the key to cranial cohesion of T. rex is the rigidity of its skull 6 feet long and 5 feet wide.

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"When you apply a lot of force, there is a compromise between movement and stability," said Associate Professor Cassie Holliday in a statement. "Birds and lizards have more movement but less stability." When we applied their individual movements to the T. rex skull, we found that he did not like to be shaken in the same way as the skulls of lizard and bird, suggesting more rigidity. "

The team of researchers said that T. rex's skull was stiff like that of hyenas and crocodiles. Previous researchers may have missed this essential feature by examining the question of what graduate student Kaleb Sellers called "a bone-only perspective", which does not take into account "all the links – ligaments and cartilages – which mediates interactions between bones ".

By combining anatomical analysis, engineering and 3D imagery, and with the help of two members of the T. rex family, the gecko and the parrot, the research team recreated models of T.'s skull. rex to observe his chewing behavior and all these. ligaments and cartilage.

The researchers said their new findings could also help evaluate studies on the jaw and muscles in humans and other animals.