If you live on the East Coast, you may have noticed that fall hasn't exactly fallen yet, with many trees retaining their green color. As Earther reports, this flaccid fall foliage is the result of abnormally warm and wet weather for this time of year. "The pump for fall colors is the cool nights and warm days," says Anne Hairston-Stang, a forest hydrologist at Maryland’s Department of Natural Resources Forest Service. Read more here.