Very interesting! I have never looked into this any deeper than what I have heard in school, but this was definitely interesting. Very nicely written, short and simple, yet very informative. If you are interested in poetry and have some spare time, I have poems on my blog that I invite you to read, especially my new one; https://steemit.com/poetry/@lukakorba/her-psychedelic-poetry-poem
Thank you for sharing this. :)