Fun facts about autumn include that its first day is called the autumnal equinox, leaves change color during this season due to decreases in chlorophyll and the ancient Greeks believed that the ground grew cold in autumn due to Persephone's kidnapping. Those who live near the equator don't experience autumn.
On the autumnal equinox, the sun aligns with the center of the planet, leading to an equal number of daylight and darkness hours for that day. Leaves always have color variations, such as orange and yellow, but the chlorophyll overpowers these colors and makes leaves green. Since there's less sunlight in autumn, the amount of chlorophyll in the leaves decreases, allowing the other colors to appear.
In Greek mythology, Hades kidnapped Persephone during autumn. Persephone's mother, Demeter, became sad and neglected her duties as goddess of the harvest. Persephone returned in the spring, at which point Demeter made plants bloom again.