What defines the end of summer? It's just how our planet is tilted
Sunday, September 22, 2013 - 11:00
in Earth & Climate
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 change once again on Sunday, with autumn beginning in the Northern Hemisphere and spring starting in the south.