this post was submitted on 15 May 2025
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Today I Learned (TIL)

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You learn something new every day; what did you learn today? Submit interesting and specific facts about something that you just found out here.

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The original was posted on /r/todayilearned by /u/kramerica_intern on 2025-05-15 16:03:56+00:00.

Original Title: TIL about Dr. Benjamin Rush who provided the Corps of Discovery with 600 "Dr. Rush's Bilious Pills," powerful laxatives containing 50% mercury, colloquially called "thunderclappers." The high mercury content provided a tracer that has allowed the Corps' campsites to be identified via soil testing.

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