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TIL you can check if a credit card number is valid with a simple algorithm

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rRoy4 TIL The holes in honeycombs don't actually start out as hexagons. Bees create circular tubes staggered with one another. The heat formed by the activity of the bees softens the wax, which connects the gaps between the holes. Then the wax hardens into the the most energy efficient shape, the hexagon.
Z8yPY TIL that a holocaust denial group offered $50,000 to anyone who could prove that gas chambers were used to intentionally kill people at Auschwitz. They were forced by a judge to pay that money, and an additional $40,000, to Auschwitz survivor Mel Mermelstein who provided proof of that very fact.
X0Pjk TIL Samsung accounted for 22.4% of South Korea's GDP in 2022.
5VMEQ TIL about sodium dodecyl sulfate, a detergent developed in the late 60's and which revolutionized protein analysis, as it unfolds proteins and gives them the same shape and electric charge density. This later led to the development of a technique called SDS-PAGE, which separates proteins by mass.
N7p4M TIL that pencils are yellow because in the 19th century, the best graphite came from China. Because yellow was a royal colour in China, pencil companies began to colour their pencils yellow to show both high quality and an association with China.