Prehistoric animal you would LEAST like to meet...

[fox1235]

I don't think that Megladon in that picture is a accurate size.

[Dermot]

Actually, if I had to choose a real prehistoric animal I'd want to avoid, it would have to be the eurypterid.

http://en.wikipedia.org/wiki/Eurypterid

They were giant sea scorpions, with some species being true megafauna larger than humans.

[Vy'drach]

That's new to me, and believe me when I say I know everything about dinosaurs and Jurassic Park.

Everything I've heard to this date was that the dromeasaurids in JP was based on the Deinonychus.

Robert T. Bakker wrote a preface about Spielberg's people calling him about them.

      "Call her Utahraptor."

              That's what I suggested to my colleague, Dr. James Kirkland of the Dinamation Society, over the phone on a January afternoon in 1992. Jim was ecstatic about a giant fossil claw just dug up by a talented amateur, Bob Gaston, in red-gray rocks of Early Cretaceous Age. It was a raptor claw.

        The bone bed was in Utah, a state with a glorious history of dino-discoveries, so the name Utahraptor popped into my head. And for some reason I automatically thought of the beast as a female.

        "Why don't you call her Utahraptor? You know, 'The Hunter of Ancient Utah.' " He did.

          I knew raptors well. When I was a freshman at college, back in 1964, I helped excavate a raptor pod in Montana--four skeletons intertwined in death, each animal about nine feet long and maybe 120 pounds weight when alive. Raptors were bantamweight dinosaurs, small and compact in the body but equipped with weapons of exceptional deadliness. They were kick-boxers. One claw on each hindfoot was transformed into a big curved knife that could disembowel prey with a single stroke.

                These Montana creatures were named Deinonychus--"terrible claw." Speed and agility were other raptor characteristics. The first raptor species ever found was the "Mongolian speedy raptor," Velociraptor mongoliensis, excavated from the fossil sand dunes of the Gobi desert in the 1920s. Velociraptor was even smaller than the denonychs, only fifty pounds or less. But Velociraptor shins and ankles were long and strong, a design specification that ensured high running speed. And all the raptor species had tails that ended in elongated stiff rods, balancing poles that let the animal engage in all sorts of nimble acrobatics.

            It became customary in some paleontological circles to use "velociraptor" for all species of the family. Or just simply "raptor."

              All Raptor species were masters of martial arts. They could twist and turn while running at high speed, and they had the capacity to jump while changing direction in midair. Raptor hands were powerful and supple too--the combination of hand claws for grabbing and hindclaws for kicking was formidable.

            The raptor family was exceptional among the Dinosauria for yet another reason: These were smart carnivores. In the 1960s, anatomists probed the inside of raptor braincase bones and found to their surprise that the raptor's brain was as large for its body weight as it is in many modern ground-running birds.

            Finding any raptor bone is a treat for us bone-diggers. But what Gaston and Kirkland had just identified in their workshop was something so spectacular, no scientist had ever dreamed of it. They had found the first giant raptor. Their claw was from a beast twice the size of any other member of the family and must have been carried by a body five hundred to a thousand pounds--eight times heavier than a deinonych. It was the find of a lifetime.

            "The claw we've got--it's huge!" I could hear Jim jumping up and down at the other end of the line, and I started jumping up and down too, because I knew something he didn't. "Jim, Jim--Jim!" I yelled. "You just found Spielberg's raptor."

          "Huh?"

          "You just found the giant raptor Spielberg made up for his movie, you know--Jurassic Park."

          Jim thought I was daft. He didn't know about the other phone call I had gotten about giant raptors that morning. It was from one of the special-effects artists working in the Jurassic Park skunk works, the studio where the movie monsters for Spielberg's film were being fabricated in hush-hush conditions. The artists were suffering from secret anxiety about what was to become the star of the movie--a raptor species of a size that had never been documented by a real fossil.

            No one outside the studio besides me knew about the problem with Spielberg's giant raptor. No professional dinosaurologist was aware of the supersize raptor being manufactured for the movie.

            The special-effects artists were superb dino-anatomists. It's funny how some of the best thinking about dinosaur shape and dinosaur movement has come from movie artists. Even the 1933 King Kong had some brontosaur sequences that were a generation ahead of the dinosaurian dogma taught at the time in universities. The artists doing Jurassic Park wanted the latest info on all the species they were reconstructing. They wanted everything to be right. They'd been calling me once a week for months, checking on teeth of T. rex and skin of Triceratops. I'd sent them dozens of pages of dino-details.

            The artists were up to date in their raptor knowledge. They knew that deinonychs were the largest, and that no raptor was bulkier than the average adult male human. Just before Jim called, I'd listened to one artist complain that Spielberg had invented a raptor that didn't exist. Apparently Spielberg wasn't happy with the small size of "real" raptors--he wanted something bigger. He wanted a raptor twice as big as a Deinonychus.

            I'd tried to calm the artists's misgivings. "You know, evolution can change size real fast. It's not impossible that a giant raptor could evolve in a geological instant. So maybe, theoretically, Spielberg's oversize raptor could have happened."

            The artist wasn't impressed with my learned argument. He wanted hard facts, fossil data. "Yeah, a giant raptor's possible--theoretically. But you don't have any bones."

                But now Jim's Utahraptor gave him the bones. The fossil beast from Utah turned out to be almost exactly the same size as the biggest raptor in the movie, an animal referred to in the script as the "big female."

              Jim got back to work at the quarry, assisted by Don Burge, director at the museum at Price, Utah. Soon, Don and Jim's crews had hand bones, foot bones, backbone, shinbones, and parts of the muzzle of their superraptor. They made a quick sketch of the entire critter, nose to tail. Not only was Utahraptor huge by raptor standards, but it carried the most lethal weapons in its hands. The foreclaws had much sharper edges and worked like a set of six recurved carving knives. 

The rest of the preface is about the Utahraptor making headlines and setting the mood for the story itself. If you want the rest of it I could type that down too, but it seemed irrelevant for this. I could of actually done away with most of this as well, but I didn't want to bits and pieces the quote.

[Kursed]

the pig!

Like anybody is going to read this -sigh- but I still vote for the pig.

[Vy'drach]

Like anybody is going to read this -sigh- but I still vote for the pig.

[ThePointingMan]

Those silly dino's, always killing each other via humorous escapades for my delight. (BTW I dunno what escapades means)

[Asper Sarnoff]

http://www.history.com/videos/predator-x-revealed#predator-x-revealed watcg this

Would take me ages on this connection. Besides, History Channel ain't exactly known to be the most accurate of sources. They're the same as all large medias, more interested in creating sensations and overdramatizing than providing actual facts.

I don't think that Megladon in that picture is a accurate size.

No it isn't. But it was the most 'badass' and creepy picture I could find of it, and that's what I was going for this time.

They were big tough. I've walked trough the fossile jaws of a Megalodon once, only had to crouch down my head slightly, and I'm 6'3".

Robert T. Bakker wrote a preface about Spielberg's people calling him about them.

The rest of the preface is about the Utahraptor making headlines and setting the mood for the story itself. If you want the rest of it I could type that down too, but it seemed irrelevant for this. I could of actually done away with most of this as well, but I didn't want to bits and pieces the quote.

Oh it wasn't that I didn't believe you. Just that it was new to me.

[Vy'drach]

Oh it wasn't that I didn't believe you. Just that it was new to me.

I figured, but providing source is usually a good thing.

[Matrilwood]

Deinonychus (AKA Giant Turkey) For the simple fact that they like to play with their food, while its still alive.

Also its size means it can sneak up on you easy. If a T-Rex manages to sneak up on you, you deserve to get ripped to shreds.

[Dermot]

Eurypterids don't unnerve anyone at all? XD

[Asper Sarnoff]

Eurypterids don't unnerve anyone at all? XD

Not really. They're very slow, not particulary big, unmanouverable and with tiny, tiny brains. Out of those above, I think a giant sea scorpion is the only one that wouldn't be able to kill me if it tried its hardest.

[EazyIN]

Angler Fish. Full size.