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TIL there are more black men in the prison system today than slaves in 1850

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6EVyX TIL that in 1986, when a five year old boy fell into a gorilla enclosure and lost consciousness, a male gorilla named Jambo stood between the boy and the other gorillas in a protective gesture, he even stroke the boy's back. This incident helped create a positive public perception of gorillas.
g48L TIL: “Teardrop” by Massive Attack was chosen to be the opening sequence of House because the song roughly mimics the sound of a beating human heart.
WjOL TIL Scientists have developed a food replacement that metabolizes into solubles which are then excreted through sweat: eliminating the need to poop entirely!
yQDKv TIL that 90% of people (trichromats) see about 1 million colors, but the others, (tetrachromats) have a genetic mutation and therefore see an incredible 100 million colors. This happens more in women, with nearly 12% of women having this fourth color perception channel.
x9Zk TIL: It takes a 10-person team to unlock the 22-ton bank vault at Fort Knox - still the most impenetrable vault in the world. Roughly 3% of all the gold ever refined in human history is stored there.