T. rexes preferred a leisurely pace most of the time, strolling around at about 3 mph, according to a study published in 2021.
Scientists built a 3D computer model to understand the ideal "resonance" of the T. rex bodies.
Every animal has an ideal resonance, meaning the walking speed at which they can move their body forward most comfortably while spending the least energy.
"Many animals have a roughly similar preferred walking speeds," between 2.2 and 3.1 mph, Pasha van Bijlert, an author on the study, told Insider at the time.
If the study calculation are correct, T. rex would have been no exception.
"Humans and T. rex would not, if the study is right, have had very different walking speeds," John Hutchinson, an evolutionary biomechanics expert at the Royal Veterinary College in London who was not involved in the research, told Insider at the time.