(Jon of the Clue Crew points to an astronomical diagram on the monitor.)  In the 200s B.C. Eratosthenes calculated Earth's girth using the difference in the angle of the Sun's rays between Aswan & this Egyptian city
Winslow (TLW) [PAR] About -4000 the Egyptians develop sailing vessels (feluccas) for use near the ...... 
of the Earth by measuring noon Sun angles in wells at Syene (Aswan) and ... on 
Babylonian rather than Greek math, and the astronomical calculations begin in 
..... which explains the difference between motor and sensory nerves, mentions... [DOC] [TLE] Math and the Mona Lisa.pdf - Onion To - Description [PAR] unable to stop the French, whose troops entered the city with rel- ative impunity.