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TIL That Zoroastrianism was the official Religion of the first Persian Empire

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E1NR0 TIL the oldest known language in the world is Tamil and even till date it is spoken by 78 million people. Next in line are Sanskrit, Greek, Chinese, Hebrew, Arabic.
p8Y9Z TIL that the rate of world population growth is now decreasing.
N7bW6 TIL that Japan's rail workers use pointing-and-calling, a system of associating one’s tasks with physical movements and vocalizations to prevent errors. It is known to reduce workplace errors by up to 85 percent, according to one 1996 study.
NXgEJ TIL: In the 1950s, the UK Ministry of Defence tested chemical weapons on volunteers under the guise of "curing the common cold"
9xrB TIL cellphones in Japan can’t turn off the shutter noise in order to protect the privacy of people.