101874 Where Did That One Thick, Dark Hair Come From?

Where Did That One Thick, Dark Hair Come From?





Visit https://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)
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Sources:
https://onlinelibrary.wiley.com/doi/full/10.1111/php.12433 https://www.jidonline.org/article/S0022-202X(15)30721-1/fulltext https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6289065/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4793925/ https://royalsocietypublishing.org/doi/10.1098/rspb.2018.1520 https://www.sciencedirect.com/science/article/pii/S0015028216483202?via%3Dihub https://academic.oup.com/bjd/article/107/5/559/6689215 https://www.frontiersin.org/articles/10.3389/fphar.2019.01528/full Image Sources:
https://www.gettyimages.com/detail/video/asian-young-womans-cheek-with-typical-problem-with-acne-stock-footage/1193011783?phrase=mirror%20woman%20face&adppopup=true
https://www.gettyimages.com/detail/video/my-identity-carefree-stock-footage/1368258269?phrase=hair&adppopup=true
https://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
https://www.gettyimages.com/detail/photo/young-chimpanzee-standing-up-like-a-human-royalty-free-image/92120395?phrase=chimp&adppopup=true
https://www.gettyimages.com/detail/video/detail-of-skin-and-hair-on-females-arm-stock-footage/816257492?phrase=arm%20hair&adppopup=true
https://www.gettyimages.com/detail/video/beautiful-hair-stock-footage/1339303545?phrase=hair&adppopup=true
https://www.gettyimages.com/detail/video/close-back-view-of-brown-woman-hair-tender-movement-in-stock-footage/1326084987?phrase=hair%20and%20sun&adppopup=true
https://www.gettyimages.com/detail/video/forehead-of-very-sweating-adult-young-man-stock-footage/1301352115?phrase=sweat&adppopup=true
https://www.gettyimages.com/detail/video/texture-of-the-skin-close-up-drops-of-water-roll-down-stock-footage/831896924?phrase=sweating&adppopup=true
https://www.gettyimages.com/detail/illustration/diagram-of-body-odor-and-sweat-glands-human-royalty-free-illustration/1193095625?phrase=sweat%20gland&adppopup=true
https://www.gettyimages.com/detail/video/man-in-blue-t-shirt-with-sweat-stain-stock-footage/1384723356?phrase=sweat&adppopup=true
https://www.gettyimages.com/detail/video/asian-senior-couple-walking-and-talking-inside-public-stock-footage/1290265340?phrase=couple%20sweating&adppopup=true
https://www.gettyimages.com/detail/video/armpit-hair-stock-footage/1303793837?phrase=armpit%20hair&adppopup=true
https://www.gettyimages.com/detail/video/microscopy-of-human-hair-magnification-150x-root-and-stock-footage/1226334755?phrase=keratin&adppopup=true
https://www.gettyimages.com/detail/video/hair-loss-concept-with-man-checking-his-hair-stock-footage/1401965490?phrase=scalp&adppopup=true
https://www.gettyimages.com/detail/video/human-hair-under-a-microscope-stock-footage/1078737004?phrase=hair%20microscopic&adppopup=true
https://www.gettyimages.com/detail/video/4k-extreme-close-up-microscopic-view-of-human-hair-stock-footage/1146701712?phrase=hair%20microscopic&adppopup=true
https://www.nature.com/articles/s41467-020-19249-z/figures/1
https://www.gettyimages.com/detail/photo/closeup-shot-of-long-curly-brunette-hair-royalty-free-image/1365604508?phrase=hair&adppopup=true
https://commons.wikimedia.org/wiki/File:Androstanolone.svg
https://www.gettyimages.com/detail/video/macro-close-up-shot-of-wool-or-fur-stock-footage/1299827600?phrase=hair
https://commons.wikimedia.org/wiki/File:Human_hair_2000X_-_SEM_MUSE.tif

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