The Origin of Seasons

Introduces common fallacy about seasons, discussion of tilt of axis, why seasons are of unequal length, 3 misconceptions.
0:00 Introduction
0:45 Earth's orbit around Sun
2:14 Tilt of the Earth
3:43 Spring & Autumn Equinoxes
4:26 Changing length of days
5:24 Why seasons aren't equal length
6:49 Misconception 1
8:17 Misconception 2
9:11 Misconception 3
10:00 Effect of no tilt