Chimps have a head for numbers

@article{Harrington2008ChimpsHA,
  title={Chimps have a head for numbers},
  author={Monica B. Harrington},
  journal={Lab Animal},
  year={2008},
  volume={37},
  pages={8-8}
}
the first numeral, all remaining numerals were replaced by white squares. The chimp was thus required to remember the locations of the remaining numerals in order to touch them all in numerical sequence. All the chimps also mastered this task. The researchers note that the probability of completing the test successfully by chance is very low (1/24 with four numerals, 1/120 with five and 1/362,880 with nine). The young chimps performed better on this Chimpanzees may have better numerical memory… CONTINUE READING