The Evolution of Dinosaurs

CNN's John Sutter asks paleontologists to sum up the last 30 years of dinosaur history. The idea that you can actually determine what the colors of a lot of the feathers were is absolutely amazing, he says. One of the big changes over the past 30 years has been that China has become,. in a way, the epicenter of lots of the most interesting discoveries and it might be quite an ominous signal for the US.