TIL that some early botanists thought fern seeds were invisible, and would grant you invisibility too, if you could catch one. Shakespeare even wrote about this belief in his play Henry IV.
https://www.ou.edu/cas/botany-micro/ben/ben120.html
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1hrv42y/til_that_some_early_botanists_thought_fern_seeds/
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