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TIL about Maroons, enslaved Africans who quickly escaped in the countries they were brought to and often joined indigenous populations to form warrior tribes with their own complex language, war and living cultures. Many Maroon warfare tactics have been co-opted into global army training today.

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0dXXL TIL of William Walker, an American physician, lawyer, journalist, mercenary, slavery supporter, and Southern folk hero from from Tennessee. Walker seized control of Nicaragua from 1856 to 1857, and convinced many U.S. Southerners of the desirability of creating a Confederate empire in Latin America.
9YaxX TIL that in the history of AI research there's a time period called as AI winter, it is a period of reduced funding and interest in artificial intelligence research. A few scientists survived that. And currently we're in the AI spring, where AI is doing wonders.
P110V TIL Top Gear featured how NASA can make its own weather.
7rRmM TIL That Wolves have arrived and now outnumber the residents of Chernobyl and are multiplying and that wildlife overall in the area is now flourishing due to the lack of human interference and competition.
nee1b Just getting to the centre of the Earth and surviving is impossible. The Earth's core is about 9,000°F—as hot as the sun's surface—and would instantly roast anyone who found himself there. Then there's the pressure, which can reach roughly three million times that on the Earth's surface and would crush you. But let's not sweat the details. Once you arrive at the centre of the Earth, the physics gets really interesting.