Eratosthenes

Three things Eratosthenes is known for is

1. Was a mathematician
2. Was a Greek Astronomer
3. Is the most famous for making the first accurate measurement of the circumference of the earth 

Time Zones 

4. Portland, Oregon- 7:00 am
5. Greenwich, England- 3:00 pm
6.Toronto,Ontario- 10:00 am
7.The South Pole- 3:00 am

Locations and place names 

8.Bolivia, Colombia, Isreal, El Salvador, Marshall Islands 
9. Seattle, New York City, Chicago, Boston, Malibu 
10. Maine, Texas, New York City, California, Colorado
11. Saint Paul, Saint Charles, San Jose, San Juan, Santa Fe

Latitude and longitude 

12.latitude-39.2904 degrees north, longitude- 76.6122 degrees west
13.latitude- 0.1807 degrees south, Longitude- 78.4678 degrees west
14.latitude- 16.8414 degrees south, longitude- 179.9813 degrees west
15.latitude- 43.5321 degrees south, Longitude- 172.6362 degrees east
16.latitude- 58.3019 degrees north, Longitude- 134.4197 degrees west

Antipodes 

17. the antipode of any spot on earth is the point on earth's surface diametrically opposite to it. 
18.Departamento Conesa, RN, Argentina 
19.In the ocean 
20. Just fish