Answer:
Complex Calendars.
Explanation:
The Mayans were one of the first to create calendars, using observatories to take note of the stars and how they "rotated the earth". Using such, they could determine the approximate time as well as seasons.
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Yes he was diagnosed with infantile paralysis, also known as polio in 1921 at the age of 39
I believe it's asking you how many votes you need to get the majority. example: in a presidential election, more than 50% is the majority.
