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.
Their short forelimbs made liftoff impossible, though they may be the evolutionary remnants of an ancient ancestor's flight-giving wings. Velociraptor was probably one of the more intelligent dinosaurs, because it had a large brain proportionate to its body size.