Watch the Field Notes companion video to this episode on Nebula: https://nebula.tv/videos/realscience-sloths-tracking-the-untrackable Watch this video ad-free on Nebula: https://nebula.tv/videos/realscience-the-insane-biology-of-sloths Watch the next episode of Becoming Human on Nebula: https://nebula.tv/videos/realscience-the-first-tools Patreon: https://www.patreon.com/realscience Instagram: https://www.instagram.com/stephaniesammann Credits: Narrator: Stephanie Sammann Filming and Location Sound: CJ Caughey Editor: Dylan Hennessy (https://www.behance.net/dylanhennessy1) Editor: David O'Sullivan Illustrator/Animator: Kirtan Patel (https://kpatart.com/illustrations) Illustrator: Elfy Chiang (https://www.elfylandstudios.com) Animator: Mike Ridolfi (https://www.moboxgraphics.com/) Sound: Graham Haerther (https://haerther.net) Thumbnail: Simon Buckmaster (https://twitter.com/forgottentowel) Producer: Brian McManus (https://www.youtube.com/c/realengineering) Imagery courtesy of Getty Images References: [1] https://slothconservation.org/the-etymology-of-sloths-names/ [2] https://www.nhm.ac.uk/discover/what-was-megatherium.html [3] https://royalsocietypublishing.org/doi/10.1098/rspb.2019.2885#:~:text=Prehensile%2Dtail%20suspension%20is%20a,mass%20needed%20to%20support%20the [4] https://commons.clarku.edu/cgi/viewcontent.cgi?article=1001&context=studentworks [5] https://slothconservation.org/think-stronger-sloth/ [6]https://link.springer.com/article/10.1007/s10914-017-9411-z [7] https://www.frontiersin.org/articles/10.3389/fphys.2019.00769/full [8] https://pubmed.ncbi.nlm.nih.gov/31588601/ [9]https://www.montclair.edu/prism/2018/11/27/sloths/ [10] https://www.researchgate.net/publication/344231358_Sloths_Bradypus_variegatus_as_a_polygastric_mammal [11] https://beckycliffe.com/sloths-slow/ [12] https://peerj.com/articles/875/ [13] https://academic.oup.com/jmammal/article-abstract/61/3/465/867178?redirectedFrom=fulltext&login=false [14] https://peerj.com/articles/5600/ [15] https://slothconservation.org/newly-published-sloths-extraordinary-metabolic-response-temperature/#:~:text=It%20appears%20that%20delicate%20adjustments,of%20hyperthermia%20at%20hot%20temperatures. [16] https://www.science.org/doi/10.1126/science.193.4248.157 [17] https://royalsocietypublishing.org/doi/full/10.1098/rspb.2013.3006