You wait half an hour for an airport shuttle bus, then two show up at once. It's not bad planning, it's chaos, says Japanese researcher Takashi Nagatani of Shizuoka University.
http://www.nature.com/nsu/030929/030929-2.html

What exactly is chaos? Put simply, it is the idea that it is possible to get completely random results from normal equations. Chaos theory also covers the reverse: finding the order in what appears to be completely random data.
