T. rex

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T. Rex May Have Had Lips to Hide Its Ferocious Teeth

That goes against the popular image of the dinosaur in 'Jurassic Park' and elsewhere

(Newser) - The image of a "ferocious-looking" Tyrannosaurus rex with a "permanent smile" of huge protruding teeth is taking a hit thanks to one Canadian paleontologist, Live Science reports. Robert Reisz says the T. rex, along with other theropods, actually had scaly lips covering its teeth. “When we see... More »

For T. Rex, Size Originally Didn't Matter

Horse-sized ancestor reveals evolutionary path, and intellect came before size

(Newser) - Though one of the most well-known dinosaurs, Tyrannosaurus rex is actually somewhat of a mystery, having suddenly emerged as a fearsome beast some 80 million years ago. As a 20-million-year gap in the fossil record preceded T. rex, paleontologists have known little about its evolutionary path—until now. The discovery... More »

T. Rex Had Vicious Teeth, the Better to Shred You With

This feature is only seen in the Komodo dragon today

(Newser) - The Komodo dragon is the only known creature on the planet today to boast teeth that are serrated, like a jagged-edged steak knife. But now researchers have discovered that the mighty T. rex not only sported serrated teeth, but also secret folds hidden toward the bottom of those teeth that... More »

In 'Crap' Dinosaur Fossils, Scientists Strike Gold

If 75M-year-old soft tissue has survived, could DNA, too?

(Newser) - The fossils may be in such poor shape that scientists are calling them "crap," but the 75-million-year-old fragments are golden in another sense. A theropod claw, triceratops-like toe bone, and duck-billed dinosaur limb and ankle bones first unearthed in Canada 100 years ago appear to retain soft tissue,... More »

Massive 'King of Gore' Dinosaur Found in Utah

Lythronax argestes was a ferocious beast, the largest of its ecosystem

(Newser) - Tyrannosaurus rex may have ruled the land in its day, but a newly discovered species, its closest known relative, was the top dog some 10 million years earlier. Lythronax argestes—which translates to "the king of gore from the southwest"—lived 80 million years ago in the central... More »

T. Rex: History's Best Biter

It was like having an elephant sit on you

(Newser) - Yet another reason that Tyrannosaurus Rex was the scariest creature to ever stalk the planet: Scientists have figured out that T. rex boasted the most powerful bite of any animal in history, reports BBC Nature . The clench of the dinosaur's massive jaw was between 30,000 and 60,000... More »

Did Dino Meat Taste Like Chicken?

Probably not, and here's why

(Newser) - Turns out T. Rexes liked to eat other T. Rexes —so the obvious next question is, what does a T. Rex taste like? Not like chicken, writes Brian Palmer on Slate . But birds are related to dinosaurs, and it’s probably another bird—the hawk—that dinosaur meat is... More »

Tasty Snack for T. Rex: Another T. Rex

Paleontologist finds evidence of cannibalism

(Newser) - It looks like T. Rex was a cannibal. So says a Yale paleontologist who found telltale bone gouges on a fossil of the giant dinosaur that make it all but certain it had been eaten by a fellow T. Rex. That prompted him to take a closer look at other... More »

Dinosaurs Arose in S. America

Fossil of T. rex cousin helps fill in the puzzle

(Newser) - The fossil of a feisty little ancestor of T. rex lends credence to the theory that dinosaurs emerged in South America. More precisely, they likely arose about 230 million years ago in Pangaea, which was then the single joined continent of the Americas. The development follow the discovery of a... More »

Sore Throat May Have Axed T Rex

Trichomonosis still affects modern birds and makes eating almost impossible

(Newser) - Tyrannosaurus rex could have been laid low not by a planetwide dinosaur holocaust or vicious infighting, but by a parasite that still affects modern birds. Researchers have taken a close look at lesions on T. rex fossils once presumed to be battle scars and concluded that they are the work... More »

Pint-Size T-Rex Surprises Scientists

'Raptorex' was 1/100th the weight of its descendant

(Newser) - Paleontologists have unearthed a miniature predecessor of Tyrannosaurus Rex, a finding that may rewrite the origins of the most iconic of dinosaurs. “Raptorex,” discovered in China, has all the distinctive features of a Tyrannosaurus—large head and jaws, long legs, and small arms—but it weighed only 150... More »

'Beach Bum' Dino Chilled in Mex

New find reveals crested duckbill hunted by cousin of T. rex

(Newser) - A newly discovered duck-billed dinosaur lived on a "very Mediterranean-like" Mexican beach 72 million years ago, paleontologists say. A fossilized skeleton of Velafrons coahuilensis was found in the north-central state of Coahuila—the most complete dinosaur ever found in Mexico, Reuters reports. "Velafrons was probably a beach bum,... More »

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