Outside the tropics, autumn marks the transition from summer to winter, beginning in september (northern hemisphere) or march (southern hemisphere). Autumn, season of the year between summer and winter during which temperatures gradually decrease It is often called fall in the united states because leaves fall from the trees at that time. These fall leaves images and gorgeous autumn backgrounds will have you ready to say hello fall and embrace the change of season! Although the chemistry of autumn colours is well understood, there is an ongoing debate among scientists about why trees evolved their vivid autumn colours in the first place. Fall and autumn are often used interchangeably to describe the third season of the year
But did you know there's a difference in their original meanings F all is about leaves tumbling from.
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