Chimpanzees have a superhuman short-term memory which can be practically observed in their capacity to remember the positions of numbers in space and their order when they are flashed for just half a second. This research is currently being done at the Primate Research Institute of Kyoto University, previously directed by the primatologist Tetsuro Matsuzawa. The current theory behind this ability is that the human brain traded off this detailed short term memory for language.