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Key Facts In This Video
In 1902, the most common theory as to what the moon was made of according to children was cheese. 00:36
Around 240 BC, Eratosthenes became the first known person to accurately measure the Earth's circumference. 03:16
The moon has a surface area of about 14.6 million square miles—about 92.6% less surface area than Earth. 05:58