. >> merafhe shamukuni was trampled to death last year while on his w way home in kasa. hihis sister dorcus sums u upe findings of the police investigation. >> he tried to run back, but then probably there were others there, so he tried to run down the stairs and tried to hide behind the bushes, so they pulled him. >> she tells us there used to be fewer elepephants in the area d they were less a aggressive. >> in the past, they were just calm animals. you'd pass an elephant just feeding there, sometimes without even seeeeing it. but nowadays they actualally charge, without even a person provoking them anyhow. >> she says the aggression may well mean the elephants are feeling stressed. the question remains -- if the elephant population continues to rise, and the human popupulatin grows asas well, unhappy encounters will prprobably continue to occur, and a sustainable solution will still need to be found. >> in our "global ideas" series, we head to the pacific ocean. it's home to many species of sea turtle. our r reporter clarere richarn went to the arnavon islands, part o