Answer: direct observation and experiment.
In designing his new calendar, Caesar enlisted the aid of Sosigenes, an Alexandrian astronomer, who advised him to do away with the lunar cycle entirely and follow the solar year, as did the Egyptians. The year was calculated to be 365 and 1/4 days, and Caesar added 67 days to 45 B.C., making 46 B.C. begin on January 1, rather than in March.
Answer:
No they did not have an advanced economy.
Explanation:
The sumerians did have great wealth though because they moved to the Fertile Crescent which gave them farmland and they also had trade routes.
Answer:
because both sides used the war as an excuse to attack and plunder their neighboring homesteads
Explanation:
have a great day ahead :)