A forager that finds nectar performs a 'waggle dance': the angle of her run relative to vertical shows the direction of the food relative to the sun, and the length of the waggle encodes the distance. Karl von Frisch won the 1973 Nobel Prize for decoding it. It's a rare animal message about something that isn't there.
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.