Mini: Shampoo

Humans haven't had shampoo for very long in our relative history. What about our ancestors, what did they do without shampoo? Animals don't seem to require shampoo. What is this weird practice and what would happen if we gave it up? This mini investigates Big Shampoo!

Links and References

1. https://books.google.com/books/about/An_Uncommon_History_of_Common_Things.html?id=bcaXzXPP8ooC
2. https://www.medicalnewstoday.com/articles/319848#takeaway

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