Why Did the Dinosaurs Disappear?

This hasn't really anything to do with dinosaurs, but is more akin to a science lesson delivered from the future. That's a future when we can use telescopes to see into the past of our planet and it's history assessing just what happened, when and why - to the extent that our knowledge is complete and uncomfortably perfect. How might that impact on what's to come for mankind? The unremarkable and rather dry animation is presented in the form of a series of slides, almost as if you were back in school, and is supported by some generic statements that though potent enough, are all a bit sterile. Perhaps it's trying to emphasise that life without mystery would be dreadfully dull?