Making Chickens Lay Falcon Eggs: The Science of De-Extinction

Have you ever dreamed of snapping pictures of a live wooly mammoth at the zoo? Perhaps you could buy a mammoth wool beanie in the gift shop afterwards, or pay a little extra for a ride on the mammoth's back.
And maybe you've thought, "Science has come so far now ... why not try cloning a mammoth? We have the technology, let's do this thing!" You're not alone in those thoughts. In fact, there's a dedicated group of scientists working on this technology of "de-extinction". And they've made some astounding progress ...