Pass the Butterworms Author:Tim Cahill Cahill takes us to the steppes of Mongolia, where he spends weeks on horseback alongside the descendants of Genghis Khan and masters the Mongolian death trot; to the North Pole, where he goes for a pleasure dip in 36-degree water; to Irian Jaya New Guinea, where he spends an evening with members of one of the last head-hunting tribes.