1. UKS2 Topic: Dinosaurs and Fossils Block H: Charles Darwin and his theory of evolution Session 4
Darwin on extinction
Darwin thought that extinctions happened gradually as one species was replaced by another
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2. Darwin on extinction
Darwin thought species also went extinct when they couldn't compete with another species for food

3. Darwin on extinction
Darwin didn't believe in mass extinctions being caused by catastrophes – but he was wrong

4. Darwin on extinction
Darwin thought extinction was an important part of evolution, as less advanced species were replaced with more advanced ones.
Again, he was wrong. Species only become better adapted to changing environments, not more advanced.