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TIL a general rule for plants is that lighter-coloured leaves require more light and darker-coloured leaves require less light. This is due to the amount of chlorophyll a and b found in the leaves.

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neRx7 TIL that a very large telescope in Chili is officially called “the Very Large Telescope.”
6E7nZ TIL 250 Union soldiers surrendered to the Confederates, enlisted in the Confederate Army while held as POWS, were recaptured by the Union Army, and then re-enlisted as Union soldiers. They were called Galvanized Yankees.
O7d6 TIL the first commercial digital navigation system, Etak, was released in 1985, before commercial GPS. The founders had to digitize their own maps which were so accurate they’re still in use today, including in Apple’s Maps app.
kJL1W TIL that there are 2 Dennis the Menaces (A UK and a US one) that were both published on the same day in a complete coincidence
4xMw TIL a man claiming to be the younger brother of Jesus gathered a cult of followers. They started a civil war that lasted for 14 years and claimed at least 20 million lives.