Do tourists stress out safari animals? We tested their dung to find out

Every year, thousands of tourists pile into game drive vehicles or don their hiking gear and cross South Africa’s nature reserves. Binoculars and cameras at the ready, each hopes for a special encounter with Africa’s wildlife – as small as dwarf mongooses, as mighty as elephants, or as elegant as giraffes. Wildlife tourism is an industry worth hundreds of billions of dollars globally. The income from tourists is needed to pay for conservation. But a question has been asked: are tourists…