A scientific theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment.
Velociraptor (veÂ·locÂ·iÂ·rapÂ·tor) (Speedy Thief) was a small carnivorous dinosaur, well known thanks to Jurassic Park. It was one of the smaller dromaeosaurs, smaller than Utahraptor and Deinonychus. It lived in Mongolia and China during the Late Cretaceous, 75 to 71 million years ago.
Velociraptors from Jurassic World, larger than Deinonychus, smaller than Utahraptor. Notice the absence of feathers. Weight estimate: 150 to 250 kgs (330 to 551 pounds). Restoration of a V. mongoliensis, an actual Velociraptor. Weight estimate: 10 to 15 kgs (22 to 33 pounds), or about the size of an Andean condor.