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TIL Female Kangaroos Have Three Vaginas

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8am9a TIL Historically, Native American communities conducted a salmon ceremony where they showed respect to the first caught salmon by sharing it with everyone in the community, cleaning its skeleton and returning it to the river where it could return to its kin and tell of the respect it received.
9YbAX TIL of Recy Taylor, a black woman who was kidnapped and gang-raped by 6 white men in Alabama in 1944. Despite their confessions and going to trial twice, the men were never convicted.
QJ9Ee TIL Jackie Robinson's brother Mack won silver in the 200m at the 1936 Berlin Olympics - behind Jesse Owens
4XaBg TIL non-invasive prenatal testing, which draws blood from the mom to detect fetal abnormalities, can detect maternal cancer. Multiple severe chromosomal abnormalities can mean mom has cancer rather than fetus has many birth defects
XEe0j TIL that there are over 2 trillion galaxies in the observable universe and that up until 1924, the common knowledge was that the milky way was itself the whole universe