As David Attenborough turns 100, longtime collaborator Mike Gunton shares stories from decades behind the camera. From beers at base camp to crawling inside a termite mound, Gunton reveals the humour, courage and genius of the man the world thinks it knows

Researchers have found that coloured microplastics may contribute to global warming at levels equivalent to 16.2 per cent of black carbon’s impact. The findings challenge earlier studies that underestimated the climate effects of plastics by focusing mainly on clear materials