All season, we’ve been unpacking the controversial ways we’re messing with nature to save the planet. In this episode, we explore the wildest intervention to date: de-extinction. We take a tour of Colossal Labs, the $10 billion Dallas startup betting it can reverse-engineer extinction itself, to see how they plan to turn pigeons into dodos and Asian elephants into woolly mammoths.

But whether it’s bringing back the woolly mammoth from extinction or shooting sulfur dioxide into the stratosphere, just because we can mess with nature, does that mean we should? After the tour, host Amy Scott chats with Pulitzer Prize-winning environmental journalist Elizabeth Kolbert to find out.