Come play Cell to Singularity today, for free on iOS, Android and Steam: https://l.linklyhq.com/l/1uX46 Watch this video ad-free on Nebula: https://nebula.tv/videos/realscience-the-insane-biology-of-the-narwhal Patreon: https://www.patreon.com/realscience Instagram: https://www.instagram.com/stephaniesammann Images Courtesy of Getty Images Thanks to our Patreon Supporters: Eric Ypsilantis Robert Thompson Keith Skipper Credits: Narrator: Stephanie Sammann Writer: Lorraine Boissoneault Editor: Dylan Hennessy (https://www.behance.net/dylanhennessy1) Illustrator: Jacek Ambrożewski Illustrator/Animator: Kirtan Patel (https://kpatart.com/illustrations) Animator: Mike Ridolfi (https://www.moboxgraphics.com/) Sound: Graham Haerther (https://haerther.net/) Thumbnail: Simon Buckmaster (https://twitter.com/forgottentowel) REFERENCES [1] https://link.springer.com/content/pdf/10.1186/1472-6785-7-14.pdf [2] https://www.nature.com/articles/s41598-019-44038-0 [3] https://psc.apl.uw.edu/rp/laidre/narwhal-faq/ [4] https://www.cell.com/current-biology/pdf/S0960-9822(23)01644-5.pdf [5] http://staff.washington.edu/klaidre/docs/Laidreetal_2012.pdf [6] https://anatomypubs.onlinelibrary.wiley.com/doi/pdfdirect/10.1002/ar.22886 [7] https://animalbiotelemetry.biomedcentral.com/articles/10.1186/s40317-023-00325-2 [8] https://esajournals.onlinelibrary.wiley.com/doi/pdf/10.1890/ES13-00137.1 [9] https://www.youtube.com/watch?v=OoTjLIN67Bw [10] https://royalsocietypublishing.org/doi/pdf/10.1098/rsbl.2019.0950 [11] https://zslpublications.onlinelibrary.wiley.com/doi/10.1111/jzo.13134 [12] https://onlinelibrary.wiley.com/doi/10.1111/mms.12165 [13] https://polarresearch.net/index.php/polar/article/view/8343 [14] https://www.cell.com/current-biology/fulltext/S0960-9822(21)00225-6?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS0960982221002256%3Fshowall%3Dtrue