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Ancient Cartography

• Eratosthenes is known for being the first to measure the circumference of Earth
• Eratosthenes was also known for inventing an easy system to find out prime numbers
• Lastly Eratosthenes was know for figuring out the Summer Solstice 

Time Zones

• 7:00 am
• 3:00 pm
• 10:00 am
• 3:00 am

Locations and place names 

• Potomac MD, Lake Placid NY, Niagara Falls, Bryce Canyon UT, Thunder Bay ON
• Ohio, Minnesota, Wisconsin, Idaho, Illinois
• Kansas, North Carolina, Tennessee, Texas, Lincoln NE
• St. Augustine FL, Ava Maria FL, San Antonio TX, St. Louis MO, St. Paul MN

Latitude and longitude 

• 39.2 N, 76.6 W
• 0.1 S, 78.4 W
• 16.8 S, 179.9 W
• 43.5 S, 172.6 E
• 58.3 N, 134.4 W

Antipodes

• The point found on the surface of Earth which is diametrically opposite to it

Antipode for following locations

• Departamento Conesa Argentina,
• Indian Ocean
• Indian Ocean