How we know that spring has sprung

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. The seasons officially changed once again on Wednesday, with spring beginning in the Northern Hemisphere and autumn starting in the south.What is it that causes the change?The ability to predict the seasons — by tracking the rising and...

Add to: del.icio.us | Digg