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Friday, August 7, 2015

T. Rex had Unique Serrated Teeth

If you want to know the secret behind the success of Tyrannosaurus rex and their dinosaur cousins ​​who also is a meat eater, consider the teeth.

Scientists on Tuesday, July 28, 2015 has published a comprehensive analysis of the teeth of carnivorous dinosaur group called theropods, reveal unique serration structure which allows them chew the meat and bones of their large prey effectively.

Theropods are the largest land predators on Earth. They first appeared about 200 years ago and is the dominant land creatures that eat meat until the era of dinosaurs ended 65 million years ago.
A boy looks inside the skull a Tyrannosaurus Rex replica at the Egidio Feruglio Museum in the Argentina's Patagonian city of Trelew, May 18, 2014. (Picture from: http://bit.ly/1KHTOU4)
Research involving six species of theropod teeth reveal their complexity previously unknown. Network internal teeth are arranged so that adds to the power and extend the life of bergeriri teeth like steak knives to enable them to digest other dinosaurs.

A paleontologist of University of Toronto Mississauga, Kirstin Brink said existing fossil shows that the teeth of T. rex could crush bones. Teeth found embedded in the bones and bone fragments prey out of the dirt that has become fossilized.

"The most efficient cam latches to stab or cut meat and grabbed him as he tore the meat, which is known for its 'puncture and pull' style of eating," Brink said.

The researchers analyzed the pieces of fossilized teeth using a microscope and a powerful tool that can show the chemical properties of the teeth.

They examined teeth from ancient Coelophysis tend to be small; Troodon that resembles a bird; large predator Allosaurus, Gorgosaurus, Daspletosaurus, Tyrannosaurus and Carcharodontosaurus; and Spinosaurus large and semi-aquatic.

The teeth of Tyrannosaurus and Carcharodontosaurus have length up to 23 cm.

"In theropods, their bigger and deeper teeth than envisaged, making the teeth stronger and last longer, and less likely to be damaged or wear out," said paleontologist Robert Reisz.

Dinosaur teeth can continue to grow throughout their lives. If one tooth broken, then the new tooth will grow.

"It took until about two years so that the tooth can be re-grown in large theropods like T. rex. Therefore, with specially strong teeth means fewer and fewer broken tooth gap in the jaw, and enables an efficient way of eating," Brink said.

Komodo dragons, giant lizards, whose size reached 3 meters of Indonesia, is the sole surviving reptilian teeth serration similar to theropod teeth though teeth that evolved independently of dinosaurs, said Brink. This research was published in the Scientific Reports journal. *** [EKA | FROM VARIOUS SOURCES | VOA NEWS]
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