Page created on : May 6, 1998
Last updated : June 12, 2005

The dinosaurs had 165 million years of domination of the earth from approximately 230 million to 65 million years ago. One theory of why the greats beasts became extinct is because they could not adjust to drastic climatic changes brought about by a giant asteroid striking the Earth.

Remains of dinosaurs have been found on all continents, with the first Canadian discovery being made at Morgan Creek, Saskatchewan in 1874 by geologists of Her Majesty's North American Boundary Commission. The famous «badlands» of Alberta have yielded the most dinosaur finds in Canada to date.

Albertosaurus
Massospondylus
Platecarpus
Styracosaurus