Sources:
https://u.osu.edu/biomuseum/2017/01/23/what-is-a-buckeye/
https://u.osu.edu/biomuseum/2017/01/27/the-story-of-the-ohio-buckeyes/
https://people.howstuffworks.com/why-is-buckeye-seed-in-pocket-good-luck.htm
http://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?taxonid=281045
https://www.history.com/topics/world-war-ii/marshall-plan-1
https://www.thelantern.com/2000/11/history-of-the-buckeye-in-a-nutshell-2/
https://www.merriam-webster.com/dictionary/Aesculus
https://sciencing.com/bring-the-outdoors-inside-with-these-nature-kits-for-kids-13763822.html
https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=29729