The Ten Year Drip

Professor Thomas Parnell, of the University of Queensland in Brisbane, wished to show his students that pitch, the paving tar often used on roofs and roads, was a fluid not only on very hot days or just after being poured, but all the time. By doing so, he started one of the longest running experiments in history. » 8/19/11 8:30am 8/19/11 8:30am