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3

TIL Hyenas are more closely related to cats than dogs.

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7r7rO TIL in Scandinavia the Kiruna to Narvik electrified railway carries iron ore down a steeply graded route. On the way down the trains generate large amounts of electricity by regenerative braking, which is sufficient to power the empty trains back up the track and pump excess energy into the grid.
M7MBb TIL: In 2014, a Chinese company in Shanghai, offer its employee of the year one night with a Japanese Adult film actress as a bonus.
160Ld TIL it takes three months to clean the windows of the Burj Khalifa, and it's done four times a year, so the 36-man team's process never stops.
BgMxx TIL Dolphin Spermatozoa are capable of penetrating zona intact bovine oocytes and producing hybrid embryos via IVF (In Vitro Fertilization).
Vx7Q TIL Livia Soprano was suppose to die when Tony tries to suffocate her in season 1. However, Nancy Marchand, who played Livia, was sick with cancer and said to the creator, “David, just keep me working.” He graciously obliged. She died before her final scenes so they CGI’d her head on a body double.