History: Bison skulls waiting to be grounded for fertilizer, 1870. The Norh American Bison population was reduced from an estimated 50 million to as low as 541. A handful of ranchers saved the species from extinction [1840 x 1438]

https://i.redd.it/o6a71jqhu1f21.jpg via /r/HistoryPorn https://www.reddit.com/r/HistoryPorn/comments/anycgk/bison_skulls_waiting_to_be_grounded_for/?utm_source=ifttt