Science commentator Laurie Winkless joins Kathryn to look at how commonly-used pesticides can impair honeybees' ability to navigate. Researchers gave wild-caught honeybees sugar - while others got pesticide-contaminated sugar and then made them walk in front of video screens to think they were off-course. She'll also look at why astronauts at the international space station have been helping researchers work out how liquids interact with solids - without gravity getting in the way. Laurie Winkless is a physicist and science writer.