Image Histograms of the Four Seasons
It is possible to notice large seasonal differences by looking at a histogram of the colors in a picture of the same place throughout the year. These pictures are from Central Park in New York City.[more]
Seasons are caused by the slight inclination of the Earth's axis in its orbit around the Sun.
The seasons in the Southern and Northern Hemispheres are opposite: when it is winter in the USA and Europe, it is summer in Brazil and Australia.[less]