It's been 65 million years since the dinosaurs became extinct. But what wiped them out? Hear arguments from the Gradualists and Catastrophists. Biology - Adaptation And Evolution - Learning Points. 65 million years ago the dinosaurs...

From the western gorilla to the blue whale, thousands of animal species are under various levels of threat. What can we do to protect them or is it already too late? Biology - Adaptation And Evolution - Learning Points. An astounding...