Aussie fern invades Auckland's urban forests, analysis of 32

Science commentator Dr Sophie Fern looks at recent study into the staghorn fern, a native of Australia that was brought to New Zealand and loves Auckland's forest canopies. What can stop this weed from spreading? Researchers in the US have done a content analysis of 32 years of the TV show 'Shark Week' to see how sharks as a species are presented and who was presenting themselves as experts on them. And what happened to seabirds on one of Australia's sub-Antarctic islands after a big drive to get rid of predators? Dr Sophie Fern is a biologist specialising in conservation and natural history