There is a hole in the side of the rock pile just large enough for the passage of a baboon 's pliable , open hand .
In Africa , baboons are trapped by humans who build a big pile of rocks hollowed at the center .
There is a hole in the side of the rock pile just large enough for the passage of a baboon 's pliable , open hand .
In Africa , baboons are trapped by humans who build a big pile of rocks hollowed at the center .