Meet the stars of Smithsonian's new Fossil Hall
Meet the stars of Smithsonian's new Fossil Hall The meat-eating predator Ceratosaurus tried to take down Stegosaurus, but the plant-eater got away and gained the upper hand. (Lucia RM Martino/Fred Cochard/James Di Loreto/Smithsonian Institution/NMNH)
Meet the stars of Smithsonian's new Fossil Hall
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When the Smithsonian's Hall of Fossils-Deep Time exhibition opened last June, hundreds of species sprung to simulated life. The fossil specimens cover a lot of paleontological ground. They span 3.7 billion years of our planet's history and represent a wide variety of organisms. Among them are some of the most fearsome creatures to ever walk the Earth. The dinosaurs who dominated the ancient Mesozoic Era. These creatures strike updated poses for the new display. All are up to date with current scientific research. The stars of the new hall are ready for their closeup.

Tyrannosaurus rex

The dino: There's a reason T. rex, which lived 68 to 66 million years ago, has grown into a fearsome cultural icon. T. rex has stomped across movie screens and into the world's imagination. The predator was one of the largest carnivores to ever walk the Earth. It towered over other dinosaurs at more than 15 feet tall and 40 feet long. It had huge serrated teeth, shaped and sized like bananas. T. rex could tear through flesh and crush bone, eating up to hundreds of pounds of food in a single bite. The carnivore earned its name, which translates to "tyrant lizard king." It dominated its food chain by devouring plant-eating prey and even smaller carnivores.

The fossil: The T. rex reigns supreme as the bold centerpiece in the new fossil hall. The creature is dramatically posed. It's either about to deliver a deathblow to its prey or taking a scrumptious bite of an already dead triceratops. Dubbed "The Nation's T. Rex," the fossil is just beginning its stay in the capital as part of a 50-year loan from the U.S. Army Corps of Engineers. Recreational fossil hunter Kathy Wankel discovered the specimen in Montana in 1988. She found it while digging around on a family vacation. A team from the nearby Museum of the Rockies completed the excavation. They found the T. rex was well intact, with about 50 percent of its bones in place.

Research: The T. rex fossil is one of the best-studied specimens in the hall. But it still has some secrets to reveal, says Matt Carrano. He is the museum's dinosaur curator. Scientists still aren't sure whether T. rex was a brutal killer or more of a scavenger. Or some combination of the two. In the display, Carrano says curators intentionally left some room for interpretation. And, of course, there's the mystery of how T. rex used its tiny arms. They were too short to hold onto prey. It appears the arms were still functional. They had all necessary muscles in place to offer mobility and some strength. Paleontologists, says Carrano, are stumped when it comes to their potential use.

Triceratops

The dino: Triceratops was roughly the same as an elephant and had intimidating horns. But Despite its massive size, Triceratops, which lived 68 to 66 million years ago, was a (mostly) peaceful herbivore. It munched on shrubs and palms. The dinosaur may have used its horns and bony neck frill to protect itself from predators. Triceratops had a huge head. It was about one-third the length of its whole body. Its beak-like mouth was filled to the brim with up to 800 teeth.

The fossil: The Triceratops is actually a "computer-assisted digital version" of the museum's former display specimen, Carrano says. The original skeleton was a composite that borrowed bones from ten different animals. This resulted in a charming but oddly proportioned mashup. It spent nearly a century on the museum floor in less-than-ideal display conditions. The fossil was in rough shape. In 1998, curators opted to replace the crowd favorite with a cast. It was created by scanning the original fossil and manipulating a digital version into a more accurate skeleton. The cast version, nicknamed Hatcher after the scientist, John Bell Hatcher, who collected the original skeletons. That was in the late 19th century. It is the one being attacked by the T. rex in the new hall. The original fossil is now held safely in the museum's collections for research.

Research: Paleontologists are pretty confident the Triceratops served as prey for T. rex. A number of studied Triceratops fossils are peppered with puncture marks from the lizard king's distinctive teeth, Carrano says. Less certain is how Triceratops interacted among its own kind. Most Triceratops fossils unearthed by paleontologists lay in isolation, far from any others. But in 2009, new research suggested the dinosaurs might have been more social than previously thought. That's after scientists discovered a "bonebed" with three juvenile Triceratops skeletons clustered together.

Diplodocus

The dino: Diplodocus hallorum was a towering, plant-eating sauropod that lived 157-150 million years ago. Diplodocus used its neck like a fishing rod. It stuck its head straight out to mow down plants with its set of peg-like teeth. Its teeth may have regrown as often as once a month. It was one of the longest dinosaurs, with a body that could stretch to about 100 feet. Most of that length came from its neck and tail. Some scientists believe Diplodocus could crack the tip of its tail like a whip to communicate or scare off predators.

The fossil: This specimen is about 60 percent complete, Carrano says. The body and back end are mainly intact. The museum first put Diplodocus on display in 1931 after years of prep work to mount the enormous specimen. Now, the skeleton towers over the Deep Time hall. This time in a livelier pose. Diplodocus now appears to be in lumbering motion. Its tail is lifted slightly off the ground and its neck craning over visitors in the hall's central walkway.

Research: Researchers are working to uncover the cause of an unusual pathology in this specimen, Carrano says. The Diplodocus appears to have suffered some sort of injury or infection. In one big stretch of the tail, the dinosaur's bones essentially fused together and turned the whole section rigid. Bone is covering up joints and some tendons appear to have ossified.

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CRITICAL THINKING QUESTION
What was the coolest thing you learned about the dinosaurs in this article? Why did you think it was cool?
Write your answers in the comments section below


COMMENTS (2)
  • FionaH-dur
    1/21/2020 - 03:00 p.m.

    I thought an interesting part was when they had a paragraph of the Dinosaur and things about it like length hight and prey or predator. Like the T. rex and diplodocus. It was cool how the triceratops was controlled by a computer well at the museum. I thought it was cool because the information was new to me and other people.



  • DuoDuo
    3/07/2020 - 02:36 a.m.

    I thought the best part of the researches of the dinosaurs is we can learn the whole life of them through the fossils.It's amazing to learn these creatures about their life stylies.This kind of information can always give us more ideas of nature history.

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