Category Archives: Animals

A Paleontologist’s Critique of Jurassic World

I have written here before about being a professional paleontologist. As such, I have to say I was not enthusiastically looking forward to the newest installment of the Jurassic Park franchise, Jurassic World. In fact, I expected to hate it.

From the previews the story line was hinted at: another park with dinosaurs, many unrealistic reconstructions of the fossil animals they were supposed to portray, a new genetically engineered dinosaur, and packs of raptors being led against the new bad dino by a motorcycle-riding hero (a paleontologist, we thought surely). Oh boy, we thought collectively. A “paleontologist” leading a pack of trained raptors against other dinosaurs to defend humanity. Proving to doubters that his rag-tag team of raptors could be led and become the heroes he knew them to be. What a cliché and a stinker of a movie this will be.

"Jurassic World poster" by Source (WP:NFCC#4). Licensed under Fair use of copyrighted material in the context of Jurassic World">Fair use via Wikipedia.

Jurassic World poster” by Source (WP:NFCC#4). Licensed under Fair use via Wikipedia.

But I went, as I knew I had to be culturally literate about what 10 year olds would be asking me for the next dozen years. Things like, what will it be like to be the alpha raptor?

And to my surprise, I didn’t hate the movie. I actually liked it. Here is why: there is not a single paleontologist in the entire thing!

This movie took strides to move away from the science of paleontology altogether. Sure, the park has big dinosaurs, but none of the dinosaurs they created were “real.” Even in the original park, they pointed out, all the dinosaurs had additional genetics to make them viable animals, so they were always facsimiles of dinosaurs anyway. And now in Jurassic World they are going all out and creating attractions, not reality.

In the past Jurassic Park movies to one degree or another there was an attempt to conform to current knowledge of dinosaur biology. And by walking the line between science and movie making they repeatedly failed to satisfy the picky scientists. “Velociraptor was not that big.” “Most of the dinosaurs are from the Cretaceous, not the Jurassic.” “The T. rex should have feathers, why didn’t they put feathers on them!”

But in Jurassic World they didn’t need a single cartoonish paleontologist character to advise them on how the animals looked or behaved (“She cannot see you if you don’t move.” Yeah, right), or espousing the latest dinosaur lore. It is as if the movie makers were saying “Get off our backs you paleontologists!”

chris-pratt-velociraptor-jurassic-worldThere is no real pretense to be scientific. Hybrid dinosaurs? We are just making them up as attractions, so no problem. Using packs of dinosaurs led by a human against other dinosaurs. Sure, why not. The evil characters were the marketers and the genetic engineers making things up for profit, and the ever-present corporation looking to weaponize something. No paleontologists needed.

And Chris Pratt’s character, Owen Grady, the one who looked suspiciously like the love child between Indiana Jones and, well, a paleontologist version of Indiana Jones…not a paleontologist. OK fine, he can train all the wild animals he wants to.

The franchise may never die, and now they can continue to make thrilling movies with spectacular special effects unrestricted by scientific sour grapes. They can concoct all the crazy, wild, mean, giant critters they want, and I for one will not get a professional (dinosaur) feather ruffled. Just don’t pretend that they represent real prehistoric critters.

Finally, paleontologists have been freed from “the Park.”

*I cannot help myself. Mosasaurs were not that big, and pterosaurs could not have carried off full grown women. There, I said it.

jurassic-world-trailer

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What’s the value of a fossil?

I have the privilege to work as a professional paleontologist. Many people are excited by fossils and beasts from the past, and the media loves to cover new discoveries. Periodically, a friend will ask if I had heard of the latest fossil find being discussed by the media, almost always touted as the latest, the greatest, the biggest, or the best example of whatever. With genuine enthusiasm my friend will ask how thrilled I am about it. While I really appreciate their eagerness for me and my profession, when the fossils were collected by someone hoping to sell them I have to say, no, I am not really excited about the find.

My friend will usually blink a few times, trying to understand how I could feel that way. How can I help them understand why academic paleontologists are not excited by such specimens? Why if I have dedicated my career to learning about life of the past would I not even be interested in seeing such fossils? Wouldn’t all scientists be falling over themselves with glee to see these treasures? No.

The latest example is the so-called Dueling Dinosaurs from Montana, and much has been written about them, a meat-eating and a plant-eating dinosaur found together, promoted as having died in mortal combat. But these fossils are simply the latest example in the long-standing conflict between science and the commercialization of fossils. The key to easily understanding this conflict is to understand the two very different ways of appraising the value of a fossil: commercial and scientific.

We are immersed in the commercial value of things. Everything has a price. All around us in everyday life we see prices placed on goods and services. We are so comfortable making judgments about the monetary value of items we even have game shows like the Price is Right where we compete with each other to do so.

Additionally, we are familiar with collectors of all types. Art collectors, people who collect baseball cards, or old bottles. We occasionally hear of a rare collectable item selling for high prices, and fossils seem like they could be in that same category of potentially valuable collectable items.

"Sues skeleton" by Connie Ma from Chicago, United States of America - Sue, the world's largest and most complete dinosaur skeleton.Uploaded by FunkMonk. Licensed under CC BY-SA 2.0 via Wikimedia Commons - http://commons.wikimedia.org/wiki/File:Sues_skeleton.jpg#mediaviewer/File:Sues_skeleton.jpg

“Sues skeleton” by Connie Ma from Chicago, United States of America – Sue, the world’s largest and most complete dinosaur skeleton.Uploaded by FunkMonk. Licensed under CC BY-SA 2.0 via Wikimedia Commons

High-profile fossils have occasionally been valued at very high market values. The Tyrannosaurus “Sue” sold at auction for over 8 million dollars. Recently another similar dinosaur was to be sold for over a million. The sellers of the Dueling Dinosaurs are reported to want 7 to 9 million. And the implication is clear—you can get rich on dinosaurs.

In our market-based society it is easy for non-scientists to think that market value must be the same as scientific value. High-dollar fossils must be worth more to science, right? This equivocation, however, is false.

To appraise the market value of a fossil you have to know what a willing buyer will pay a willing seller under current market conditions.

The scientific value of a fossil is very simply its ability to add to existing knowledge. To appraise the scientific value one needs to know about all the research that has taken place to date, all the specimens currently known to science, and an individual fossil’s potential to tell us something we didn’t already know.

The issue hinges on the fact that for a fossil to have high scientific value we must be extremely confident in the reliability of the information that accompanies it. The commercial collection of fossils is usually driven by other pressures, and unfortunately there are far too many examples where the information valued by scientists is not collected. Or worse, where the information is unreliable or even falsified. Too frequently people looking to sell fossils for large monetary gain collected the fossils illegally, or dishonestly, and then seek to hide those facts from buyers. The temptation of large payoffs is often too great.

From a scientific stand point the value of a fossil is significantly reduced if we do not know, or cannot rely on, certain basic information. Where did the fossil come from? Who collected it? Can we be sure it is one fossil or is it a composite of two or more fossils? Could it be a forgery? Do we have records of the fossil’s context with the surrounding rocks? What did the rocks tell us about the environment in which it was buried? What other fossils were found with it that would give clues to the environment in which it lived? What clues were with the fossil that may have gotten removed during the preparation of the fossil?

The primary “currency” of academic paleontologists is integrity—if our colleagues lose trust in our work and our word we have nothing. So, there is little incentive to deceive or falsify our data or claims, and in fact there is a great potential for career-ending consequences if one is caught being dishonest.

Unfortunately that is not the case for commercial collectors. In a climate where you can sell a fossil for millions of dollars you just need to do that once to be set for life. The integrity and motivations of commercial collectors is then suspect; there are just too many examples of theft, lies, and deceit.

I am not implying anything about the people involved in the Dueling Dinosaurs. Rather, I am saying that the general lack of academic enthusiasm for their fossils is because of past experience. The prices demanded are out of reach of museums and the risk of obtaining false data is just too great. When the next biggest, best, and rarest fossil comes around we must watch their sale with detached sadness, and hope for the best.

Perhaps the Dueling Dinosaurs will end up at a museum, and maybe any questions about the integrity of those fossils can be satisfactorily addressed. Perhaps those fossils will become a conversation piece in someone’s trophy room, and if so they will likely be lost forever to science and by extension to all of us.

Fortunately, the public lands of the United States are available to researchers, where the ownership of fossils is clearly established to be the public, and commercial value plays no role. There, and on private land generously made available by land owners, scientists and genuine amateur enthusiasts can collect, study, and learn about the past with fossils that can advance our knowledge.

For the landowners, field collectors, and the people involved in buying and selling fossils I guess I have to say I don’t blame you for your interest. Fossils are cool. And if you make a million dollars, I guess good for you. However, understand that the commercial collection and sale of fossils has virtually nothing to do with the science of paleontology. The only commonality between the two is the fossils, and whereas commercial fossils may have a high market value, their scientific value is severely compromised.

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Why Get a GPS Dog Collar?

Dogs are fast and can easily get lost before you or even they realize it. The GPS dog collar was first made for hunting dogs, since they were expensive. People that were serious about hunting bought these collars and used them to keep track of their animals. Over time prices started to drop and casual hunters as well as normal dog owners starting to get these collars. There are many advantages to these collars. If you dog runs away or is stolen, then you can track him or her much easier if they are wearing one of these special collars.

How Does the Collar Work?

The collar has a transmitter and also a receiver. The transmitter is located in the collar and uses a satellite signal to send location information all the way back to the receiver. Some devices use a radio signal to get the job done. The receiver can be used on your computer or as a hand held piece of equipment. A good feature for some of these systems is that you can give your dog a safety roam area. If your dog leaves that area, then the device will instantly alert you. Some dog tracking devices will also let you mark locations, for example where your vehicle is located.

What To Look For in a GPS Collar.

Look for a buckle connector if possible rather than an easy to fall off velcro strap. Some older models do not work their best in woods. Make sure that no matter what model you choose, there is always fresh batteries in it before you go hunting.

Where Do You Buy a GPS Dog Collar?

You can not find this type of collar at your normal department stores. You can find them usually at major hunting or outdoor stores such as Bass Pro Shops. You can also find them online at places like Amazon.com or eBay. Be wary of the older models with velcro. Enjoy what a GPS dog collar can offer.

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The largest pterosaurs have not been grounded yet

In one post (New evidence on the size of pterosaurs) we explored the study by Henderson (2010) in which he modeled pterosaur body forms to generate estimates of body mass. He modeled different areas of the body separately, applying various densities to the different body sections to calculate his masses. His results suggested that the largest pterosaurs like Pteranodon (wing span of 17.5 feet) and Anhanguera (wingspan 13.5 feet) weighed about as much as the heaviest flying birds (41 and 14 pounds respectively). He reasoned that birds represent a reasonable analogy for flying limits in vertebrates, so this range of masses could represent the upper limit of being able to have powered flight in vertebrates.

His results for the giant pterosaur Quetzalcoatlus were astonishing. His calculations suggest that this animal weighed in at 1200 pounds, with a wingspan of almost 37 feet. After discussing various ways to interpret this result, Henderson suggested that maybe these truly giant animals did not fly at all, but were secondarily terrestrial. This evolutionary track can be found among the birds with giants like ostriches and emus growing large and losing the ability to fly.

The giant pterosaur Quetzalcoatlus northropi compared to a modern giraffe. Illustration by Mark Witton.

The giant pterosaur Quetzalcoatlus northropi compared to a modern giraffe. Illustration by Mark Witton.

Henderson’s work and conclusions was challenged by Witton and Habib (2010). Their criticisms involve several arguments. First, they suggest that birds may not be the best models for flight capacity, and that wing structure, overall anatomy, and launch mechanics were very different in pterosaurs. If so, then using birds as models for flight requirements and limitations in pterosaurs could significantly skew the results.

The heart of the arguments of Witton and Habib are the estimates of wingspan and mass suggested previously for pterosaurs. They note that relatively modest difference in wingspan calculations could have dramatic implications for calculations of mass. They state that mass estimates for a pterosaur with a 43 foot wingspan would be almost twice the estimate for a pterosaur with a 33 foot wingspan. Their assessment of the fossil material suggests that no pterosaurs had a wingspan of greater than 33-36 feet.

Likewise, Witton and Habib are critical of the body shape models used by Henderson for Quetzalcoatlus, arguing that his estimates of body size were too large, and were responsible for the very high mass values he obtained. Combined with Witton and Habib’s wingspan estimates, they calculate a body mass for Quetzalcoatlus of about 440 pounds, about one third the value of Henderson.

All of this discussion about wingspans and weights teases us with the question we really want to know—did the largest winged animals ever known actually fly? Could we have looked up into the Mesozoic skies and seen an animal flying overhead with a 34 foot wingspan and weighing as much as a tiger?

The problem, as is often the case in paleontology, is a lack of fossil material. The preserved material of these large pterosaurs is very fragmentary, and this significantly impacts our ability to accurately estimate their overall size and mass. We have in these two studies outlined here two extremes. We need more fossils before we can really know which study is most accurate.

Also, it is likely that birds may not be the best models for pterosaur flight as pointed out by Witton and Habib. Birds do things very differently than bats, our only other modern flying vertebrate, and it is most likely that pterosaurs had unexpected adaptations. For example, Habib (2008) is finding evidence for a vaulting launch in the largest pterosaurs.

Check out this video on the Quadrupedal launch in pterosaurs for an interesting viewpoint.

The largest pterosaurs have not been grounded quite yet.

 

References:

Habib, M.B., 2008. Comparative evidence for quadrupedal launch in pterosaurs. Zitteliana, B28: 159-166.

Henderson, D.M., 2010. Pterosaur body mass estimates from three-dimensional mathematical slicing. Journal of Vertebrate Paleontology, 30(3): 768-785.

Witton, M.P. and Habib, M.B., 2010. On the size and flight diversity of giant pterosaurs, the use of birds as pterosaur analogues and comments on pterosaur flightlessness. PloS One, 5(11): 1-18.

 

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Geographic Insights about Big Bear Lake

Most visitors to Big Bear Lake come from the urban sprawl of Southern California, city dwellers at heart. Few have a real appreciation of the underlying geology or geography that circumscribes the place they visit for the rest and recreation found at Big Bear. They are exquisitely well positioned to appreciate the built environment, from the lakeside marinas to the range of lodging at Big Bear Lake. But the natural environment is not well understood.

There’s something really special about Big Bear and its environs. Nestled in the mountains, this 7 mile long alpine lake, which originally existed as a shallow lake and marsh (before the dam made it deeper), drains a watershed stretching from the high desert on the northwest (see California Tourist Guide for maps and info about Deserts and Inland Empire) to the Santa Ana river watershed to the east. It’s located at a high elevation (6,750 feet at lake level), which means that it stays cool/cold year round and thus explains the extended skiing season available for 6 months a year, even though it is near to balmy Los Angeles.

In fact, the elevation explains the heavy precipitation, too. Big Bear receives about 5 feet of snow a year, and some years can be almost double that. While that’s great for skiing, the principal value is feeding the fresh water of the lake itself, sustaining the fish population in the lake and the verdant flora along the entire watershed.

The fauna of the region have been distorted by human development so that what exists now is hardly what existed for so many years. While one can find the occasional coyote, you would be hard pressed to find a bear … and the original European settlers named the valley for a reason: in pursuit of some cattle thieves, Benjamin Wilson, an early pioneer, took 22 pairs of men into the canyon … and they came out with 22 bear hides. Needless to say, the population of California brown bears and grizzly bears has been severely reduce

The other feature of the natural environment worth mentioning is mining. After the gold rush in Northern California, several efforts were made to look for gold in the San Bernadino Mountains, starting in 1859. Bear Valley delivered some bear meat for the prospectors (those poor bears!), but the gold strike was found in Holcomb Valley, 5 miles to the north, not in Big Bear (Lucerne) Valley. That was probably best in the long run, as no significant ecological destruction occurred in Bear Valley, unless you count the extirpation of the Grizzly Bear in the early 1900s.

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