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TIL that the Inca Road system was at least 40,000 kilometres (25,000 mi) long. The roads were carefully planned and maintained. They were paved where necessary, had stairways, bridges and constructions such as retaining walls and a drainage system. Only 25% of the system remains visible today.

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ep7Q6 TIL Sumer was the first known civilization in southern Mesopotamia. It was there between 6,000 and 5,000 BC. Its writing goes back to around 3000 BC. The oldest texts come from the cities of Uruk and Jemdet Nasr.
NP41 TIL that Disney was so eager to persuade Robin Williams for the voice of the genie in Aladdin that before approaching him they animated and lip-synced the genie doing a performance from Robin’s album Reality… What a Concept. Williams was impressed and immediately accepted the role.
j665a TIL that stimulating a specific region of the hypothalamus can induce a male mouse to mate rather than attack another male mouse. Conversely, stimulating a different hypothalamus region can induce the male mouse to attack rather than mate with a female mouse.
j6yrR TIL Linda Guillory holds the world record for both: the largest collection of playable gaming systems with 2,430 and the largest collection of LCD gaming systems with 1,599.
yV888 TIL the Cologne Cathedral in Germany has the “Shrine to the Three Kings” that is believed to contain the bones of the Three Wisemen who brought gifts to the newborn Jesus. They also have three crowns that they supposedly wore.