Of all the ancient calendar systems, the Maya and other Mesoamerican systems are the most complex and intricate. They used 20-day months, and had two calendar years: the 260-day Sacred Round, or tzolkin, and the 365-day Vague Year, or haab. These two calendars coincided every 52 years.
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They were able to have control over Spain and allowing Carthage to retain only its territory in North Africa. Hope this helps.
In 1849 gold was discover in California so everyone migrated there. This transformed the landscape and population of California.
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