T Rex could not run.

Dinosaurs replace their teeth throughout their life. And T. rex replaced all of their teeth every year.

Dinosaurs are built just like birds - they can squat down, they can get up. Mammals, when we lay down, we throw our legs out to the sides - birds cannot do that. Dinosaurs could not do that either.

We all have genes that come from our ancestors that aren't used - they're not turned on. So we actually carry ancient genes with us. If you could figure out how to turn those on, you could resurrect ancient characteristics from our ancestors.

Right now people are interested in genetic engineering to help the human race. That's a noble cause, and that's where we should be heading. But once we get past that - once we understand what genetic diseases we can deal with - when we start thinking about the future, there's an opportunity to create some new life-forms.

In the future, I'd like to see paleontology as a whole get a lot more quantitative.