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 ...