Photo of the Day: The Quaking Aspen is named as such because their lightweight leaves tremble in even the slightest breeze. . . . #POTD #photooftheday #picoftheday #aspen #quakingaspen #aspentree #nature #fall #foliage #fallfoliage #yellow #golden #autumn #autumnal #naturephotography #botany #facts #themoreyouknow