Most humanoid Bashny.Net

These chimpanzees decades living in isolation in Guinea able to chop nuts, simultaneously manipulating three objects (a stone-hammer, nuts and rock-hard place that must be followed). Even among chimpanzees rarely encountered such experts - in many populations preserve the ability to use two guns at the same time (nut and stone-ground), but operated with three things - it's a whole different level. With four (monkeys sometimes need another stone-wedge which supports the anvil) does not know how to handle one.

via factroom.ru