Ernie Button is a photographer who, in his quest to join his wife in whisky drinking, started taking photos of his drinks. He noticed that certain types of the alcohol would leave behind complex patterns of rings and others would not. So his curiosity drove him to reach out to experts to find out why.
By what means did rocks weighing hundreds of tons find their way to the site of China's formidable, 600-year-old Forbidden City? Scientists specializing in friction have proposed a new hypothesis.