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TIL 3M engineers inadvertently built a force field under a huge roll of fast moving tape strong enough to act like an impenetrable wall.

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gr65W TIL the parasitic wasp Habrobracon can cope with over 180 times of a Human’s lethal radiation exposure. While a Cockroach can survive 6 to 15 times the lethal dose for Human’s.
kVk7 TIL immediately after the Challenger explosion, shares of every corporation involved in the Space Shuttle dropped. But by the end of the day, most had rebounded; only Morton Thiokol remained low. This was months before the official investigation found Thiokol to be responsible for the disaster.
v1r9r TIL a total of 62 extras and crew members died after a fire broke out while filming the Indian historical drama The Sword of Tipu Sultan (1989). It is the largest number of on-set deaths in film history.
mx06o TIL Acai berries contain theobromine and are as dangerous to dogs as chocolate
yd48 TIL in 1998 Serena Williams claimed she could beat any male tennis player ranked over 200, Karsten Braasch, ranked 203 at the time, accepted the challenge and beat Serena 6-1, followed by Venus 6-2. Subsequently Serena then changed her claim to any male player ranked over 350, but never challenged.