the clock gave dates of 25.3 +/- 2.4 , 11.9 +/- 1.7 , 5.9 +/- 1.2 , and 4.9 +/- 1.2 myr ago ( +/- refers to standard error ) for the separation of rhesus monkey , orangutan , gorilla , and chimpanzee , respectively , from the line leading to humans .
C1413503
clock
C0086418
humans