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TIL many Native American tribes used fire for thousands of years to manage forest brush for small game hunting as well as creating grasslands for big game to be hunted. This resulted in many species of plants, animals, and fungi to become extinct as the forest became a fire-adapted ecosystem.

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Z8V9a TIL a Giant Pacific octopus named Billye learnt to open childproof pill bottles. She could execute the push-and-turn trick - without any instruction - in an average time of five minutes.
XEank TIL moviegoers seeing "13 Ghosts" in 1960 could choose if they wanted to see the ghosts or not. The ghosts were added with a red filter on scenes with a blue filter. People were given viewers with red and blue cellophane, and depending on which one they looked through could "remove" the ghosts.
WkeLB TIL Seven’s a lucky number if you need to restart the whole internet. Only seven people from the ICANN can restore it in case of a catastrophe. The DNSSEC root key holders would be summoned to a base in the United States to oversee a reboot of the system, using their keys to enable it.
Da9r TIL that during WWII Congress imposed an “Excess Profits Tax” to keep corporations from profiteering from war. This is not the case today.
8eXA8 TIL that the original run of “The Jetsons” lasted only one season and 24 episodes before being cancelled for low ratings. It found success in syndication on Saturday mornings, and another 51 episodes were made over 20 years later, from 1985-1987.