What Darwin Didn't Know: The Modern Science of Evolution Season 1 Episode 10 Cambrian Explosion to Dinosaur Extinction

Darwin was puzzled by the sudden appearance of complex, diverse flora and fauna in the fossil record roughly 540 million years ago, a period known as the Cambrian explosion. And Darwin had no idea that the history of life on Earth has included five big mass extinction events followed by accelerated periods of evolution that often took life in radically new directions.