T. rex 'too large' to run fast

John Hutchinson, a National Science Foundation postdoctoral research fellow, studies the evolution of anatomy and locomotion. His computer analysis shows that T. rex lacked the muscle mass necessary to run quickly.

Video: Jack Hubbard

• Tyrannosaurus rex probably could not run fast, scientists say
  
  
• Neuromuscular Biomechanics Lab
  
  
• University of California-Berkeley Museum of Paleontology
  
  
• Hutchinson's homepage
  
  
• Gould redraws boundaries between science and art (11/11/98)