Science: Methane's fast rise, Kakapo colour-change

Science commentator Laurie Winkless joins Kathryn with three fascinating recent studies. The first has found that despite a pledge by more than 150 nations in 2021 to slash methane emissions by 30% by the end of this decade, they're actually rising faster than ever. Kakapo feathers have actually changed over time - now researchers think they know why. And an Australian study may've solved the mystery of how large gold nuggets form. Laurie Winkless is a physicist and science writer