Psychologists Benjamin Jones and Josep Call at the University of St Andrews, in the U.K., have found via behavioral experiments that chimpanzees know that they rely on luck when making guesses about certain things. Their paper is published in the journal Biology Letters. Psychologists Benjamin Jones and Josep Call at the University of St Andrews, in the U.K., have found via behavioral experiments that chimpanzees know that they rely on luck when making guesses about certain things. Their paper is published in the journal Biology Letters. Plants & Animals Phys.org – latest science and technology news stories