Good luck finding a BioSteel™ Goat, a transgenic chestnut tree, or an alcoholic rat at your local natural history museum. For that, you’ll need to head to Pittsburgh’s Center for PostNatural History, where modified organisms aren’t just the norm—they’re the star attraction. Museum Director and artist Rich Pell joins Ira to talk about why we need a “postnatural” history museum, and to share the stories behind some of the Center’s most intriguing denizens.