Summary During the Triassic period, 234 million years ago, a sudden change in climate caused by long-term volcanic eruptions triggered an episode of excessive rain and flooding for two ...
1. Summary Over 65 million years ago, most types of dinosaurs went extinct after roaming the earth for 160 million years. Some scientists believe an asteroid approximately 12km wide had...
1. Summary In this video, we see how the Rocky Mountains were created by the movement of the Pacific and North American plates. We learn that parts of the range are up to 1000 miles awa...
1. Summary This video outlines how plate tectonics moved North and South America to where they are today. The video also depicts how plate tectonics influenced the migration of ancient ...
Summary This video explains two of the main types of speciation. It provides examples of certain isolations or barriers that make way for a new type of species to form. It e...