What is the sound of one hand clapping? You may have encountered this cryptic question at some point. It is a koan, or riddle, devised by the 18th-century Zen Buddhist master Hakuin Ekaku. Such ...

Hand clapping is ubiquitous behavior for humans across time and cultures, serving many different purposes: to signify approval with applause, for instance, or to keep time to music. Acousticians often ...

Meditate on this Zen Buddhist koan (a paradox used to train Zen Buddhist monks) long enough, promises neuroscientist Nikolay Kukushkin at the start of his book, and the origins of mind, and perhaps ...