Rating is available when the video has been rented.
This feature is not available right now. Please try again later.
Published on Mar 29, 2019
What is the most fierce dinosaur? How many dinosaurs species get discovered annually? And why *do* cats love boxes?
In advance of the June 8, 2019 opening of #DeepTime, our reimagined fossil hall, Smithsonian vertebrate paleontologist Hans Sues addresses these audience questions in the latest episode of "The Doctor Is In."