New research suggests that T. rex was far slower than movies suggest

Scientists at the University of Manchester have utilized new technology to make a surprising discovery about the world's most famous dinosaur, the Tyrannosaurus rex.

According to the research, the terrifying T. rex was actually incapable of running as suggested in movies like "Jurassic Park." In fact, doing so would actually have broken the dinosaur's legs due to all the weight the Jurassic giant carried.

Using 3D laser scans of the uncovered bones of the T. rex, scientists were able to piece together how the dino moved by examining its tissue mass, and comparing it to running bird data. As its skeletal structure suggests, it likely walked more like your everyday grackle than the frightening beast in the movies.

The summary from the report gives us the rundown on the T. rex's inability to run things down:

Here we present a new approach that combines two separate biomechanical techniques (multibody dynamic analysis and skeletal stress analysis) to demonstrate that true running gaits would probably lead to unacceptably high skeletal loads in T. rex. Combining these two approaches reduces the high level of uncertainty in previous predictions associated with unknown soft tissue parameters in dinosaurs, and demonstrates that the relatively long limb segments of T. rex — long argued to indicate competent running ability — would actually have mechanically limited this species to walking gaits.

Previously, it was believed that the T. rex could run at 45 mph. However, the new research suggested that the world's most famous carnivore in history could only hit 5 to 15 mph.

For comparison, 15 mph is the average running speed for a human. Usaine Bolt, currently the world's fastest human, has been clocked at 28 mph.