You’re picturing dinosaurs wrong: the facts and fiction of Jurassic Park

Ever since Jurassic Park roared into cinemas in 1993, introducing a generation to the awesome of live action dinosaurs and giving us the most famous toilet death in cinema, dino-nerds have been happily picking apart the movie’s scientific accuracy.

Chiming in to the debate with some scientific rigour, the Natural History Museum last week held a special event – Facts, Fiction and Fossils – for a talk with the experts about what the movie got right, what it got wrong, whether what we know has changed in 23 years, and whether it even matters, followed by a screening of the movie. Double nerd whammy.

It was a treat to go to a talk about dinosaurs in the very place established by the guy who dreamt up their name, Richard Owen. And you know you’re getting into something good when your directions to the theatre contain the instruction: “Take the stairs past the stegosaurus.”

Panelists Paul Barrett, a researcher for the museum’s vertebrates and anthropology paleobiology department, and Greger Larson, professor of evolutionary genomics at the University of Oxford, said that while a lot of the science in Jurassic Park is kosher, the book’s author Michael Crichton and director Steven Spielberg did take some creative liberties.

ian malcolm chest
Typical mathematician (your experience may vary)

Let’s take a look at those, but first, some context.

In the middle of a polymerase chain reaction

Jurassic Park was published in 1990, in the midst of excitement in the scientific community around polymerase chain reaction (PCR), a new genetic technique that allows researchers to amplify sections of DNA strands.

According to legend, Crichton was inspired by an 1985 article, “Dinosaur Capsule”, where (the now controversial) author Charles Pellegrino predicted that the way things were going with PCR, we’d be able to build our own dinosaurs in 30 years’ time.

*does maths, checks watch, takes a look around, sees no dinosaurs*

Ah well, never mind. It must have seemed feasible at the time – just months before “Dinosaur Capsule” appeared, a team had managed to extract strands of DNA from the fossilised muscle of a quagga, a member of the horse family that went extinct in 1883. By comparing the quagga’s DNA with that of its closest living relative, the mountain zebra, the team could determine that the two had a common ancestor that lived three to four million years ago, which was consistent with the fossil evidence.

Understandably, this got a lot of people VERY excited. What, we can look at extinct creatures’ DNA now? What does this MEAN?

alan grant

Oh, hi there Reality. Didn’t see you come in. We know now that DNA really doesn’t have much of a shelf life. After a living thing dies, its long DNA strands begin to break down, eventually becoming too small to carry any meaningful information.

A study from 2012 that examined the bones of the extinct moa bird put DNA’s half-life at a pleasingly precise 521 years. The oldest intact genome we’ve unearthed is a mere 700,000 years old – a good 100 times younger than any surviving dino-DNA would be – and it belonged a horse that had been long buried in Canadian permafrost.

Life may find a way, however. Today, as Larson explained, it’s possible to turn certain genes on and off to get the expressions we desire in an organism, so although we can’t (yet) make a complete dinosaur, some researchers are using the technique to give birds dinosaur-like features, so they can study their development.

The Velociraptor/Deinonychus switcheroo

So what you’re picturing as a Velociraptor, the swift, smart predator that has those killer claws on each foot isn’t your real deal Velociraptor (though props to you if you pictured it with feathers. More on that later). No, the Velos in the movie were based on the much larger Deinonychus, which takes its name from the Greek for “terrible claw”. But Crichton thought Velociraptor sounded better.

Childhood memories lay shattered

The Velociraptor weighs about the same as a collie, Barrett noted.

To his credit though, Crichton very faithfully modelled Jurassic Park’s Velociraptors on Deinonychus, even consulting the species’ discoverer, John Ostrom, extensively about how they should behave in the story.

In an interview quoted in Yale News, Ostrom explains: “Crichton, in an apologetic way, explained that in the novel he decided to use the name Velociraptor, that I had said was the closest relative to the animal that I had found… He said, ‘It’s more dramatic.’ And I said I recognise that most people don’t understand Greek.”

The same article continues: “[Ostrom] described Deinonychus as an aggressive and athletic raptor that slashed and disembowelled its prey with those distinctive sickle-claws… Its long and unusually rigid tail provided stability and balance, like a tightrope walker’s pole, during chases and attacks.”

Sound familiar?

Ruffling feathers

Perhaps the inaccuracy that’s got the most discussion is the dinosaurs’ lack of feathers in the movies. While in 1993, we didn’t have any direct evidence for down-covered dinos (just a hunch), in 1996, scientists in northeast China dug up the first dinosaurs with fossilised feathers. Sinosauropteryx is a close relative of the Compsognathus (the little ones that finished off one of the InGen party in The Lost World), and the branch of the family tree that ultimately gave us birds. They lived about 125 million years ago.


Since 1996, we’ve found about 30 more feathered dinosaurs, mostly in the same area of China. It’s possible that many theropods – a group of dinosaurs that tends to walk on two legs – had feathers, including the Velociraptor. Barrett said that we don’t yet know for sure why dinosaurs sported feathers, but our best guesses are insulation or display.

The studio opted not to integrate this new knowledge into Jurassic Park’s sequels, as it thought the dinosaurs would look scarier without a layer of fluffy but oh-so-stylish plumage.

So… does all this creative licence really matter? Authenticity is overrated, Larson concluded. Ultimately, Jurassic Park is a chase movie that’s served by science, he said. And look – it got a generation wondering about dinosaurs. Some of whom might even be in the lab right now, finding the answers to these paleontological questions. But isn’t pedantry fun sometimes?


Quiz: time to let your geek flag fly

Welcome to KFS’s first monthly quiz!

Show of hands: who secretly loved a test at school? Luckily we still get to enjoy them as grown-ups, only now we call them “quizzes”, and they happen in nice places like pubs and on BBC4. Which means they’re cool now, yay!

Now KFS does special science-themed quizzes – I’ll be posting one of these on the last Thursday of each month. There will be eight questions in varying levels of difficulty from ‘gentle tease’ to ‘dear lord someone’s letting their geek flag fly’.

Some questions will ask for a connection between a series of clues. See if you can guess the connection after each clue, rather than taking a guess after seeing them all, for the authentic Only Connect experience. What the hell, even yell out “next!” to summon the next clue if you want. If you’re into counting, give yourself five points if you get the answer after one clue, three points for two, two points for three, and one if you get it after playing all four.

There are a total of 24 points up for grabs, and answers will be revealed in a later post. Ready? Here goes:

1) Where in the world?

For your first point, what is the location pictured here, and what is its scientific significance?

KFS quiz 1 q1

2) Common people

Now for some not-so-general knowledge. What do these four scientists have in common?

Peter Higgs
George Stephenson
Michael Faraday
Stephen Hawking

Need a clue? Note their nationality (and the fact that they’re all dudes).

3) Animal, vegetable or mineral?

KFS quiz1 q3

One of these images shows part of an animal (for these purposes, any living thing), another part of a vegetable (any living thing that grows out of the ground) and the other is of a mineral (anything else in the world). Which is which? Bonus points if you can tell exactly what’s being pictured.

4) Tweets from history

We’ve unearthed this tweet documenting an important discovery from the 20th century. For your next point, name the tweeter responsible.

KFS quiz1 q4

Name the year for a bonus point. You big show off.

5) What am I making?

Hydrated Silica
PVM/MA Copolymer

These are the first five ingredients of a product you probably have in your home. Name that product!

6) Picture round! What’s the connection between these four?

KFS quiz1 q6

(As that map is crazy obscure, here’s a hint – that dot is somewhere in Germany.)

7) NEXT!


What should come next in this sequence of handsome beasts?

8) Music round!

This one’s probably the toughest (but doesn’t that make the win so much sweeter?). The following songs are all getting at a connection. Name it for your last point.

…and that’s it! Don’t forget to check back next week for all the answers. Bon weekend!