Every Body Glitch Explained in 10 Minutes

Your body glitches every single day, and you never asked for any of it. It grows goosebumps for fur you don't have, hiccups like a tadpole, and in the dark it actually glows. This video goes through every body glitch, from the one you've felt a thousand times to the one you'll never feel at all: goosebumps, hiccups, brain freeze, the sleeping leg, the sun sneeze, pruney fingers, the stomach growl, the contagious yawn, the contagious itch, the joint crack, the light your body gives off, and the cells from another person living inside you. Every fact comes from a published study. Where scientists still argue, the video says so. This video explains why these things happen; it is not medical advice. #science #humanbody #biology 0:00 Intro: your body glitches every day 0:20 Goosebumps: fur you don't have 1:15 Hiccups: a tadpole reflex 2:10 Brain freeze: pain in the wrong place 2:57 The sleeping leg: a nerve rebooting 3:43 The sun sneeze: crossed wires 4:26 Pruney fingers: grip mode 5:12 The stomach growl: doing the dishes 5:54 The contagious yawn 6:37 The contagious itch 7:22 The joint crack: a bubble caught on MRI 8:10 You glow in the dark 8:52 Someone else's cells inside you 9:35 Which glitch do you get the most? Sources The biology of hair follicles (Paus & Cotsarelis, NEJM 1999): https://www.nejm.org/doi/full/10.1056/NEJM... Cell types promoting goosebumps form a niche to regulate hair follicle stem cells (Shwartz et al., Cell 2020): https://doi.org/10.1016/j.cell.2020.06.031 The hair-raising reason for goosebumps is revealed (Harvard Gazette, 2020): https://news.harvard.edu/gazette/story/202... A phylogenetic hypothesis for the origin of hiccough (Straus et al., BioEssays 2003): https://doi.org/10.1002/bies.10230 Why do we hiccup? (Kahrilas & Shi, Gut 1997): https://doi.org/10.1136/gut.41.5.712 Hiccups in newborns and the developing brain (Whitehead et al., Clinical Neurophysiology 2019): https://doi.org/10.1016/j.clinph.2019.07.015 Longest attack of hiccups — Charles Osborne (Guinness World Records): https://www.guinnessworldrecords.com/world... Ice cream evoked headaches: accelerated vs cautious eating (Kaczorowski & Kaczorowski, BMJ 2002): https://pmc.ncbi.nlm.nih.gov/articles/PMC1... Brain freeze and blood flow in the anterior cerebral artery (Serrador et al., 2012): https://sciencedaily.com/releases/2012/04/... Photic sneeze reflex: https://en.wikipedia.org/wiki/Photic_sneez... Why does bright light cause some people to sneeze? (Scientific American): https://www.scientificamerican.com/article... Water-induced finger wrinkles improve handling of wet objects (Kareklas et al., Biology Letters 2013): https://doi.org/10.1098/rsbl.2012.0999 Are wet-induced wrinkled fingers primate rain treads? (Changizi et al., 2011): https://doi.org/10.1159/000328223 Water-induced finger wrinkles do not affect touch or grip (Haseleu et al., PLoS ONE 2014): https://doi.org/10.1371/journal.pone.0084949 The enteric nervous system (Furness, Nature Reviews Gastroenterology & Hepatology 2012): https://doi.org/10.1038/nrgastro.2012.32 Yawning as a stereotyped action pattern and releasing stimulus (Provine, Ethology 1986): https://doi.org/10.1111/j.1439-0310.1986.t... Contagious yawning in children (Helt et al., Child Development 2010): https://doi.org/10.1111/j.1467-8624.2010.0... Familiarity bias and contagious yawning in dogs (Romero et al., PLoS ONE 2013): https://doi.org/10.1371/journal.pone.0071365 Neural basis of contagious itch (Holle et al., PNAS 2012): https://doi.org/10.1073/pnas.1216160109 Contagious itch in mice (Yu et al., Science 2017): https://doi.org/10.1126/science.aak9748 Real-time visualization of joint cavitation (Kawchuk et al., PLoS ONE 2015): https://doi.org/10.1371/journal.pone.0119470 Ig Nobel Prize 2009, Medicine — Donald Unger: https://improbable.com/ig/winners/#ig2009 Imaging of ultraweak spontaneous photon emission from the human body (Kobayashi et al., PLoS ONE 2009): https://doi.org/10.1371/journal.pone.0006256 Male fetal progenitor cells persist in maternal blood for 27 years (Bianchi et al., PNAS 1996): https://doi.org/10.1073/pnas.93.2.705 Male microchimerism in the human female brain (Chan et al., PLoS ONE 2012): https://doi.org/10.1371/journal.pone.0045592