Monday, September 24, 2007

What causes Earth’s seasons?


The seasons are a powerful force in our lives. They affect the activities we do, the foods we crave, the clothes we wear — and quite often, the moods we are in. On Sunday, autumn officially begins in the Northern Hemisphere, while spring starts in the Southern Hemisphere.

What is it that causes the change in seasons

The ability to predict the seasons — by tracking the rising and setting points of the sun throughout the year — was key to survival in ancient times. Babylonians, Mayans and other cultures developed complex systems for monitoring seasonal shifts. But it took centuries more to unravel the science behind the seasons.

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> posted by Trevor Hammack @ 12:48 PM   0 comments links to this post


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