Can You Find Your Third Eyelid? – Vestigial Structures скачать в хорошем качестве

Can You Find Your Third Eyelid? – Vestigial Structures

Did you know that you have a third eyelid? It's an example of a vestigial feature: an organ, anatomical structure, gene or behaviour that may seem useless now. But if we dig into the science, vestigial features can teach us a lot about human evolution... 00:00 – Third eyelid 00:46 – What is a vestigial feature? 01:38 – Human tail 02:27 – Palmar grasp reflex 02:50 – Appendix #sciencefacts #humanbody #vestigialstructure #humanevolution References: Anekar & Bordoni, 2020, ‘Palmar Grasp Reflex’ Cetin et al., 2013, ‘Prevalence of the palmaris longus muscle and its relationship with grip and pinch strength: a study in a Turkish pediatric population’ Da Silva & Gill, 2013, ‘Brief communication: A midtarsal (midfoot) break in the human foot’ DeWitt, 2008, ‘Setting the Record Straight on Vestigial Organs’ Gardner, 2016, ‘Goosebumps can give us more than the shivers’ Horvath, 2016, ‘Why don’t humans have tails?’ National Human Genome Research Institute, 2025, ‘Pseudogene’ Palci et al., 2019, ‘The homologies and evolutionary reduction of the pelvis and hindlimbs in snakes, with the first report of ossified pelvic vestiges in an anomalepidid (Liotyphlops beui)’ Rogers, 2014, ‘7 Vestigial Features of the Human Body’ Stanford Encyclopedia of Philosophy, 2018, ‘Creationism’ University of California Museum of Paleontology, 2020, ‘Lines of Evidence: The Science of Evolution’ Werth, 2014, ‘Vestiges of the natural history of development: historical holdovers reveal the dynamic interaction between ontogeny and phylogeny’ Yap et al., 2024, ‘Beyond a vestigial organ: effects of the appendix on gut microbiome and colorectal cancer’ Xia et al., 2024, ‘On the genetic basis of tail-loss evolution in humans and apes’ Additional video, photos and graphics supplied by Pixabay, Adobe Stock and Envato Elements Music and sound effects from Pixabay and Envato Elements