Blue Wedge Geography: Eratosthenes and the Circumference of the Earth
Channel: WinBear
Date: 2012-10-01

The Blue Wedge is an educational series on geography-related topics. We start with the father of geography, Eratosthenes and his method of calculating the circumference of the earth. Along the way, we cover the equator, tropics, arctic circles, latitude, longitude, time zones and trigonometry. Music by Maga Bo - "Fire" feat. Xuman and Michael Chapman and the Woodpiles "A Strangers Map of Texas."