Visit brilliant.org/scishow/ to get started learning STEM for free. The first 200 people will get 20% off their annual premium subscription and a 30 day free trial. Some days you look in the mirror and find a long dark hair where it didn't use to be. Maybe you're going through puberty, pregnancy, or menopause. Maybe you're not. But either way, that hair didn't appear out of nowhere. It just went through a bit of a transformation. Hosted by: Stefan Chin (he/him) ---------- Support SciShow by becoming a patron on Patreon: www.patreon.com/scishow ---------- Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever: Matt Curls, Alisa Sherbow, Dr. Melvin Sanicas, Harrison Mills, Adam Brainard, Chris Peters, charles george, Piya Shedden, Alex Hackman, Christopher R, Boucher, Jeffrey Mckishen, Ash, Silas Emrys, Eric Jensen, Kevin Bealer, Jason A Saslow, Tom Mosner, Tomás Lagos González, Jacob, Christoph Schwanke, Sam Lutfi, Bryan Cloer ---------- Looking for SciShow elsewhere on the internet? SciShow Tangents Podcast: scishow-tangents.simplecast.com/ TikTok: www.tiktok.com/@scishow Twitter: www.twitter.com/scishow Instagram: instagram.com/thescishowFacebook: www.facebook.com/scishow #SciShow #science #education #learning #complexly ---------- Sources: onlinelibrary.wiley.com/doi/full/10.1111/php.12433 www.jidonline.org/article/S0022-202X(15)30721-1/fulltext www.ncbi.nlm.nih.gov/pmc/articles/PMC6289065/ www.ncbi.nlm.nih.gov/pmc/articles/PMC4793925/ royalsocietypublishing.org/doi/10.1098/rspb.2018.1520 www.sciencedirect.com/science/article/pii/S0015028216483202?via%3Dihub academic.oup.com/bjd/article/107/5/559/6689215 www.frontiersin.org/articles/10.3389/fphar.2019.01528/full Image Sources: www.gettyimages.com/detail/video/asian-young-womans-cheek-with-typical-problem-with-acne-stock-footage/1193011783?phrase=mirror%20woman%20face&adppopup=true www.gettyimages.com/detail/video/my-identity-carefree-stock-footage/1368258269?phrase=hair&adppopup=true www.gettyimages.com/detail/video/extreme-close-up-of-asian-male-leg-hair-slider-shot-stock-footage/1441124223?phrase=close%20up%20body%20hair&adppopup=true www.gettyimages.com/detail/photo/young-chimpanzee-standing-up-like-a-human-royalty-free-image/92120395?phrase=chimp&adppopup=true www.gettyimages.com/detail/video/detail-of-skin-and-hair-on-females-arm-stock-footage/816257492?phrase=arm%20hair&adppopup=true www.gettyimages.com/detail/video/beautiful-hair-stock-footage/1339303545?phrase=hair&adppopup=true www.gettyimages.com/detail/video/close-back-view-of-brown-woman-hair-tender-movement-in-stock-footage/1326084987?phrase=hair%20and%20sun&adppopup=true www.gettyimages.com/detail/video/forehead-of-very-sweating-adult-young-man-stock-footage/1301352115?phrase=sweat&adppopup=true www.gettyimages.com/detail/video/texture-of-the-skin-close-up-drops-of-water-roll-down-stock-footage/831896924?phrase=sweating&adppopup=true www.gettyimages.com/detail/illustration/diagram-of-body-odor-and-sweat-glands-human-royalty-free-illustration/1193095625?phrase=sweat%20gland&adppopup=true www.gettyimages.com/detail/video/man-in-blue-t-shirt-with-sweat-stain-stock-footage/1384723356?phrase=sweat&adppopup=true www.gettyimages.com/detail/video/asian-senior-couple-walking-and-talking-inside-public-stock-footage/1290265340?phrase=couple%20sweating&adppopup=true www.gettyimages.com/detail/video/armpit-hair-stock-footage/1303793837?phrase=armpit%20hair&adppopup=true www.gettyimages.com/detail/video/microscopy-of-human-hair-magnification-150x-root-and-stock-footage/1226334755?phrase=keratin&adppopup=true www.gettyimages.com/detail/video/hair-loss-concept-with-man-checking-his-hair-stock-footage/1401965490?phrase=scalp&adppopup=true www.gettyimages.com/detail/video/human-hair-under-a-microscope-stock-footage/1078737004?phrase=hair%20microscopic&adppopup=true www.gettyimages.com/detail/video/4k-extreme-close-up-microscopic-view-of-human-hair-stock-footage/1146701712?phrase=hair%20microscopic&adppopup=true www.nature.com/articles/s41467-020-19249-z/figures/1 www.gettyimages.com/detail/photo/closeup-shot-of-long-curly-brunette-hair-royalty-free-image/1365604508?phrase=hair&adppopup=true commons.wikimedia.org/wiki/File:Androstanolone.svg www.gettyimages.com/detail/video/macro-close-up-shot-of-wool-or-fur-stock-footage/1299827600?phrase=hair commons.wikimedia.org/wiki/File:Human_hair_2000X_-_SEM_MUSE.tif

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