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TIL that in 2014 Sony made a cassette tape that could hold 185 terabytes of data or the equivalent of 3,700 Blu-ray discs.

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BrdJD TIL there is a remaining glacier within Africa; the remnant of an ice cap on Kilimanjaro
DQx7J TIL about the Varangian Guard. It was an elite military unit composed of Vikings and some Anglo-Saxons who were recruited to serve as the personal bodyguards of the Byzantine emperors. The Byzantines exclusively hired foreigners as they lacked any political allegiance.
rRvgx TIL predatory dragonflies the size of modern seagulls were present on the earth about 300 million years ago. The leading theory suggests that their large size was due to high oxygen concentrations (over 30% unlike the 21% today) in the atmosphere.
GnYG TIL ‘Skyhook,’ used to capture Lau in The Dark Knight, was real.
wLDXP TIL the judge from the Rick and Morty courtroom sketch was publicly admonished for failing to discharge his duties impartially, competently, and diligently