![](https://blogs.sas.com/content/sascom/files/2013/05/timeline1.jpg)
As a boy growing up in the 1970s, I was fascinated in particular by dinosaurs. I knew all their names, Tyrannosaurus Rex, Diplodocus, Triceratops etc. And I could also remember in which geological time period they lived, and on which continent; and what they ate, often each other of course!