A History of Mass Extinctions

The cause and impacts of the five mass extinction events in Earth's history, and predictions for a sixth which could end human life. Biology - Adaptation And Evolution - Learning Points. Is Earth experiencing its six mass extinction, as a result of man's activities? On five previous occasions, catastrophic change has killed entire populations, like the dinosaurs. Natural factors influenced these massive population changes. Rising sea levels, global warming and a meteorite have all been suggested as reasons behind the extinction of dinosaurs. A Twig Context Film. Reinforce and extend the learning required by the curriculum. Twig’s context films show abstract concepts in action in the real world.