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waitbutwhy.com
6EO6l
TIL Andromeda is 6x bigger in the sky than the moon, and it's just too dim to see with the naked eye
GYMDj
TIL If the Andromeda Galaxy were brighter, it would look 6 times wider than the moon in our night sky
5YWyR
TIL that a square-shaped building with a volume of 1.2 billion cubic meters could fit inside Earth's entire human population.