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Fecal contamination is how we verified the route of Lewis and Clark.

https://offbeatoregon.com/2501d1006d_biliousPills-686.077.ht...



Only due to their mercury chloride heavy diet.


This spent 17 hours on HN's front page (and is only just off it, I think):

Lewis and Clark marked their trail with laxatives - https://news.ycombinator.com/item?id=45087815 - Aug 2025 (78 comments)




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