wikipedia.org

b9jP4 TIL about "Cryptomnesia", where forgotten memories or ideas return to an individual and are interpreted as being new and original. It can result in unintentional self-plagiarism, and in some individuals, a sincere belief that they possess clairvoyant abilities.
gMjB7 TIL tipping (gratuity) is considered rude in Japan.
mxRaE TIL there are an estimated 20 - 40 Million people in the U.S that are affected by hay fever, which are allergies specific to grass pollen. Such allergy has proven to be the most frequent allergic response in the nation.