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TIL about the Great Green Wall, an effort to plant trees to stop desertification in the Sahara that began in 2007. Ethiopia has planted over 5.5 billion seedling since.

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p8oW4 TIL Garry Kasparov doubted the abilities of female Grandmaster Judit Polgár, stating, "She is, after all, a woman. It all comes down to the imperfections of the feminine psyche. No woman can sustain a prolonged battle." He was later defeated by Polgár in 2002.
BrVAx TIL that there is a type of tree that produces 40 types of fruits a year. The ‘Tree of 40 Fruit’ are fruit trees created using the technique of grafting, as an intersection of art, farming, and preservation and each tree produces an incredible harvest of all kinds of stone fruits.
40VJ TIL that in 2002, a fire at a girls’ school in Mecca, Saudi Arabia killed fifteen girls. It has been strongly suggested that their deaths occured due to the involvement of the “religious police,” who prevented them from leaving the building because the girls were not wearing correct Islamic dress.
6Ew87 TIL Sir Arthur Conan Doyle wrote a non-fiction calling out King Leopold's abuses
eVYL TIL: A man submitted a patent in 1979 that almost perfectly resembles an iPod. He even went as far as predicting a need for DRM and a way to distribute the music.