Jan 18, 2019
What do we think of human influence on the Earth? "Relaxed, but not complacent," says Chris Thomas. He's an ecologist and evolutionary biologist at the University of York and a Fellow of the Royal Society. In a wide-ranging discussion he tells me why he's optimistic, although we need to take urgent action to cut carbon emissions, and why he'd like to introduce elephants and hippopotamuses to the university lake.