I wanted to share this video she starred in for Mental Floss on 21 really awesome, extinct animals. You all know about the T-Rex, and Lucy (the fossil skeleton of Australopithicus afarensis), but I bet you didn't know about Eurypterids (giant sea scorpions up to 8 feet long), or the Helicoprion (shark with a spiral-shaped "tooth whorl"), and lots of other fun facts.
The Brain Scoop's YouTube channel: http://www.youtube.com/user/thebrainscoop
I find almost everything she shows fascinating, but I'll admit I'm too squeamish to watch her animal dissections or preparing animal museum specimens.
The MentalFloss video below: