Feathery gills! Adorable smiles! Cultural icons! Habitat ecology! And superhuman limb regeneration? It’s an entire episode on axolotls. You either love these aquatic salamanders, or you’ve never heard of them. Clap your tiny slimy hands for Ambystomologist Dr. Jessica Whited of Harvard Medical School’s Stem Cell and Regenerative Biology who raises and studies these beautiful creatures — including the biomedical marvels being discovered. Also discussed: their narrow niche, the ecology movement to save them from wild endangerment, pet care ethics, color morphs, green glowing genetically modified ones and so much more. And of course: Minecraft.