Dinosaurs
Learn more about dinosaur modeling by reading an article in National Geographic magazine about scientists who are bringing dinosaurs to life.
Under the oak trees, the bull gator was lying in the sand. He had been removed from a murky lake in central Florida a few days earlier. He was instantly dubbed Mr. Big by researchers. He was the size of a sofa, and his head was framed by fat jowls like a couple of throw pillows. If a rival hadn't snatched the last foot off his tail, he would have been 13.5 feet (4 meters) tall.
On his back were four people. In addition to thrashing, excited alligators can spin like twisted rubber bands. However, Mr. Big was completely docile, as inert as luggage, with his mouth taped shut and a towel covering his eyes. Instead of acting like a scientist in the middle of an experiment, he behaved like a gator enjoying the sun.
The scientist, Gregory Erickson, stood a few steps away and grimly held a force transducer, a small square plate on a plastic pole. He wanted to test the animal's bite force by placing this in its mouth. Erickson's serious demeanor was also explained by his intention to keep all of his body parts.
The towel and the tape were removed by a man on the back of the gator. The animal hissed as it opened its eyes. Steam pipe venting made the sound like a factory noise. The mouth opened like a drawbridge at a snail's pace. Mr. Big's jaw was big enough to hold a poodle. The jaws slammed shut when Erickson placed the force transducer on the largest tooth at the back of the right upper jaw.
"We're having trouble!"Erickson said this as the gator, with its pole securely fastened, started to move in his direction. However, the animal eventually relaxed. Erickson took some readings from a meter. That's a lot, two nine six!"He stated
Nearly 3,000 pounds (1,360 kilograms) of force had been applied when the creature's jaws had come together.
The fact that this small experiment was primarily about dinosaurs was odd. Erickson, a paleobiologist at Florida State University, is knowledgeable about tyrannosaurs' feeding habits, including the bite marks left on their bones. He was motivated by that research to learn more about bites in general, which is why he is working as a side hustle with crocodiles here.
We loaded Mr. Big onto an airboat to be towed back home via land, approximately an hour to the south, to Lake Griffin. Ten more gators that had just been pulled out of the water were put to the test while we spent the night lakeside. We talked about dinosaurs all the time.
"It's not like diggin' bones, is it?" Erickson turned to me shortly before dawn, when we were thoroughly soiled and swampy but still had all of our digits.
Even though bone-digging is still necessary, an increasing number of vertebrate paleontologists are looking for new ways to study dinosaurs that go beyond the bones.
They might spend the summer in a laboratory, tossing pigeons into a wind tunnel to study the development of the flight stroke, as opposed to spending it in a bone bed in the dusty Badlands. They might point and click on a computer screen, pivoting digital bones, as opposed to removing the sandstone overburden from a well-articulated ceratopsian.
These paleontologists tend to be young and idealistic, determined to increase their profession's scientific rigor. Not only do they want to hunt for dinosaurs, but they also want to find out how dinosaurs worked and behaved, which is even more difficult to reconstruct.
They are dealing with difficult inquiries:
Did dinosaurs move quickly or slowly? What were they fed? Did they move in groups or hunt alone? Did they raise their children?
How quickly did they expand? Did they continue to grow in size into old age? And at what age did they reach?
In battle, did they use spikes, frills, and horns like in the movies? Are these out-of-the-ordinary anatomical structures a part of the business of finding partners?
How did one of these groups of creatures acquire its ability to fly?
From evolutionary biology to biomechanics, botany, and physiology, these new researchers come from a wide range of fields. Computers, CT scans, x-rays, and electron microscopes are among their tools. They publish papers titled "Caudofemoral Musculature and the Evolution of Theropod Locomotion" and "Nostril Position in Dinosaurs and Other Vertebrates and Its Significance for Nasal Function."We could say that they are geekier than the older generation of dinosaur researchers, and then quickly add that we mean it in the best possible sense.
Make no mistake: Dinosaur research continues to be dominated by the "field," which encompasses all locations where bones can be found. The field has recently produced feathered dinosaurs from China, egg-laying dinosaurs from Patagonia, and a slew of new dinosaur species, including the terrifying Giganotosaurus and the scale-breaking Argentinosaurus. Direct evidence of a lost world ruled by titanic creatures that thrived worldwide between 230 and 65 million years ago during the Mesozoic era can be found in the field.
Additionally, the laboratory lacks the field's enchanting qualities. The field is where the charismatic, rock-star scientists who hang out in dinosaur graveyards with shovels, picks, plaster, graduate students, and personal documentary film crews set up the whole Indiana Jones thing.
However, Greg Erickson and other researchers' willful retreat to the fundamentals of science may be the result of the backlash and the glitz of dinosaurs. The majority of scientific fields do not draw the attention of the general public. For instance, if you study fossil mollusks, you probably won't be asked to serve as a scientific advisor for a Hollywood blockbuster. There is no snail fever. However, dinosaur enthusiasts are insatiably curious. The new generation of scientists believes that bones alone will not reveal the truth about dinosaurs or their behavior, and they want to constrain all of the hypotheses currently in circulation.
Jack Horner, a renowned bone collector, claims, "We've done what we call arm-waving" for the past 20 years. We have speculated based on very little evidence. We are now seated and asking, "We have all these ideas, are they real?"
Horner will admit that he is an expert at arm-waving. He has been arguing, for instance, since 1991 that Tyrannosaurus rex was just a scavenger and an eater of the dead, rather than the symbol of predation and the killer of killers. A turkey vulture with too much size! Horner asserts that the purpose of those banana-sized teeth was not to rip live flesh but rather to crush the carcass's bones. This is classic contrarianism, and Horner hasn't been able to persuade many of his peers that T. rex could have been anything. For instance, hyenas are both scavengers and predators at different times.
However, this is precisely the kind of argument that cannot be won by speaking louder than one's adversaries. Data are needed in science. Testing ideas is a requirement of science. In addition to being an exciting field based on the bones of enormous, terrifying animals, paleontology will be seen as a hard science, if the new generation has their way.
Lawrence Witmer says, "This is where we have the manatee and rhino heads."Heads and necks of ostriches fill an entire bin. We have geese and ducks. A bag of alligator parts is here.
At Ohio University in Athens, his laboratory is in a deep freeze. Witmer has an impressive number of heads. They were obtained by Witmer for research purposes and belonged to creatures that died or were killed for some other reason. I keep getting the impression that Witmer is about to produce The Godfather's horsehead.
The soft tissues in dinosaur heads are recreated by Witmer. His method makes use of the similarities that exist between animals from all over the universe. It turns out that a dinosaur from 248 to 206 million years ago, during the Triassic period, shared remarkable anatomical characteristics with modern alligators and seagulls.
When Witmer recently stated that artists had long placed dinosaurs' nostrils too high on the head, he caused controversy. He studied the relative positions of modern animal noses and nostrils for months. He wanted to see if there was a connection—whether the location of the fleshy nostril is indicated by the bone of the nose. He discovered that there is typically such a correlation.
After that, Witmer looked at fossils and found that modern dinosaurs have always had missing nostrils. They ought to be displayed close to the mouth and low on the nose. The animal's ability to nuzzle a potential food item and determine whether it was noteworthy would be enhanced by nostrils in that location.
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