Natural History Museum Dinosaur expert Luis Chiappe is back this week with the newest edition of KCET's "More. "

Chiappe, who is a paleo-ornithologist (yay, old birds!), tells us about the Titanis walleri, a terror bird that did a bit of terrorizing in a recent episode of "Primeval." If seeing the Titanis walleri on screen gave you ornithophobia, then watch the video and learn more about these creatures that roamed the earth 2-3 million years ago. Knowledge helps you overcome fear, right? Or maybe you're going to be left wondering if these creatures hunted in packs...

Watch previous installments of KCET's More to learn more about the science behind the creatures you see on "Primeval."