| Share



(c) Joe Tucciarone
Meaning of Name:“roofed lizard”
Period: Jurassic Period (205 million to 138 million years ago)
Size:9 meters long
Weight: 1.8 metric tons
Location: Colorado, Utah, Wyoming

The Stegosaurus had a brain the size of a walnut. Its brain was so small it is unable to coordinate the Stegosaurus's movements. These dinosaurs relied on a ganglia–a nerve center or “second brain” located in its hips–to make movement possible. But what the Stegosaurus may have been missing in brains was made up for in brawn-the long, swinging tail was studded with sharp spikes.

Information Please® Database, © 2007 Pearson Education, Inc. All rights reserved.

Smartest:Dinosaur Hall of FameEarliest Dinosaur:

More on Dumbest from Infoplease:

  • Dinosaur Central - Dinosaur Central Our guide to the amazing creatures who once ruled the planet Dinosaur News Fossil ...
  • Brontosaurus - The Great Brontosaurus Hoax by Borgna Brunner Will the real dinosaur please stand up? ...

24 X 7

Private Tutor

Click Here for Details
24 x 7 Tutor Availability
Unlimited Online Tutoring
1-on-1 Tutoring