'Hail' from the chimp: zoo ape stockpiles stones to throw at visitors

Monday, March 9, 2009 - 12:07 in Paleontology & Archaeology

Born in 1978, Santino became the dominant male at the zoo in 1994 and the only male a year later when the other male died. For his first three years of dominance the act of throwing stones across the moat separating the chimps from zoo visitors was infrequent.