Uploaded July 2023 | Updated September 2026, 2 weeks ago

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Hosted by: Jessi Knudsen Castañeda (she/her/they/them)
Michal Richardson: Writer
Kyle Nackers: Fact Checker
Alex Billow: Script Editor
Madison Lynn: Videographer
Sam Schultz: Script Supervisor
Aimee Roberts: Puppeteer
Stefan Chin: Editor
Savannah Geary: Associate Producer
Daniel Comiskey: Editorial Director
Sam Schultz: Producer
Savannah Geary: Producer
Nicole Sweeney: Executive Producer
Hank Green: Executive Producer

Sources:
animaldiversity.org/accounts/Proteus_anguinus
nationalgeographic.com/science/article/the-olm-the-blind-cave-salamander-that-lives-to-100
edgeofexistence.org/species/olm

Images:
inaturalist.org/observations/163167891
gettyimages.com/detail/photo/frog-royalty-free-image/1369694524?phrase=frog&adppopup=true
gettyimages.com/detail/video/salamander-on-rocks-stock-footage/1419839940?adppopup=true
gettyimages.com/detail/video/extraordinary-water-creature-axolotl-mexican-water-stock-footage/1202236577?adppopup=true
inaturalist.org/observations/115165481
gettyimages.com/detail/photo/the-olm-proteus-anguinus-an-amphibious-cave-royalty-free-image/1397851477?phrase=olm&adppopup=true
gettyimages.com/detail/illustration/olm-or-proteus-vintage-color-illustration-royalty-free-illustration/1445187703?phrase=olm&adppopup=true
gettyimages.com/detail/photo/closeup-on-the-rare-and-endangered-european-olm-royalty-free-image/1442904986?phrase=olm&adppopup=true