Butterfly effect t-shirt. The idea of the butterfly effect is that something as apparently insignificant as the beat of a butterfly's wings can have a massive effect on atmospheric conditions, for example causing (or preventing) a tornado. This notion comes from chaos theory. If we extrapolate we can conclude that our own efforts, although they sometimes seem futile, can in fact have important and possibly magnificent consequences for the Earth and those around us. Hence, "beat your wings, change the world".
Photo by Michael DiCarlo