SINGAPORE - In another reboot of a blockbuster franchise, Universal Studios has released the trailer for Jurassic World this week.
The fourth instalment in Steven Spielberg's Jurassic Park movies is expected to open worldwide next June.
Coming 22 years after 1993's original Jurassic Park, which grossed about US$1 billion worldwide then, much has changed in the reel world in which dinosaurs were brought back to life.
The Park is open for business, and packed with visitors, jeeps have been replaced by futuristic "gyrospheres", and leading man of the moment Chris Pratt (Guardians of the Galaxy, 2014) is the resident dinosaur expert, possibly even trainer. To up the ante, a "genetically modified hybrid" mystery dinosaur has been introduced.
In the real world, two decades of research has changed our view of what dinosaurs were, and how they might have looked.
"Palaeontologists have a few fossil bones to pick with Jurassic World", said National Geographic in an article on Wednesday.
While the special effects and leads have been updated, the science is still stuck in the 1980s, say palaeontologists.
The dinosaurs are depicted in the same way as they were shown in the original film, but scientists have dug up quite a lot more about the extinct giants since then, they say.
Here's what you won't learn about dinosaurs and fossils just by watching the movies:
1. Most dinosaurs had feathers, and did not look like smooth-skinned reptiles, as depicted in the movies. They did evolve into birds, a theory that was talked about in the 1993 movie, and has now been confirmed.
2. Some new dinosaurs have been discovered in recent years, and they look nothing like the old classics we know and love in the movies. The Deinocheirus mirificus, unveiled in journal Nature this year, had the bill of a duck, the hump of a camel and the neck of an ostrich.