NAILS AND HAIR AND EVOLUTION!!!!! We talk about hair and nails and how they got to where they are on your body! What they are made out of and also why humans have lost their hair over time (Preservation of favorable variations over the decline of unfavorable ones) So sorry for not publishing in the last (has it really been a month? I am really sorry!) I had a lot to do an also got sick at very inconvienient times!Sources:https://www.sciencefocus.com/the-human-body/what-happens-to-cells-in-our-bodies-when-they-diehttps://www.youtube.com/watch?v=RD0waXH62AIhttps://en.wikipedia.org/wiki/Keratinhttps://mangoful.com/are-nails-dead-or-alive/https://www.verywellhealth.com/keratin-5083786https://peptidesguide.com/keratin-protein.html

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