Tsundoku (積ん読) is the habit of buying books and letting them pile up unread. The word plays on 'tsunde oku', to stack up and leave, and 'doku', to read. It isn't new: according to Andrew Gerstle, a scholar of Japanese literature at the University of London, it already appears in print in 1879. The stack waiting on your bedside table has had a name for nearly a century and a half.
In Kuşköy, a mountain village in northern Turkey, people talk across valleys by whistling Turkish. A 2015 study showed that whistled Turkish draws on both hemispheres fairly evenly, whereas spoken Turkish relies mostly on the left. The physical form of the signal, it turns out, matters to the brain.
Speech has no gaps between words. In 1996, researchers played 8-month-old babies a continuous stream of made-up syllables for just two minutes. The infants picked out the 'words' by tracking which syllables tend to follow one another. That's probability calculation, done without a calculator or any visible effort.