What is a dinosaur?
Dinosaurs were large reptiles which roamed the Earth in prehistoric times from about 255 million years ago to 60 million years ago.
Why Did Dinosaurs Have Symmetry?
There are three main reasons for bi-lateral symmetry in dinosaurs. Gravity, their genes and ease of movement.
Gravity is a force which continuously pulls things towards the center of the Earth. If a dinosaur’s massive body was not symmetrical it would be unbalanced and topple over.
Gravity has played a major part in why so many animals have bilateral symmetry.
2. Ease of movement (locomotion)
By being symmetrical dinosaurs could move efficiently. This enabled them to catch prey, avoid predators &/or defend themselves.
3. Symmetry is in the Genes
From earliest times symmetry has been hard wired into the genes of almost all animals. Why? Because symmetrical creatures tend to be successful. Nature passes the reasons for an animal’s success to the next generation e.g. it includes the code for bi-lateral symmetry in a species DNA.
Most Children Love Dinosaurs
By the time a child arrives at school most can name some of the popular dinosaurs e.g. Tyrannosaurus Rex, Triceratops, Stegosaurus & the Teradactyl. We now know of over 700 different types of dinosaurs. You might like to investigate some of them.
Did you know Australia had dinosaurs dinosaur? e.g. The Muttaburrasaurus. Argentina is thought to have had the larges dinosaur ever to have lived. The Dreadnoughtus. You might also like to check out the head-butting dinosaur. The Pachycephalosaurus.