Bbc Inside Science

UK Prime Minister Rishi Sunak gave a hastily arranged press conference this week in which he confirmed he would be rowing back on some previously made government commitments regarding net zero - the point at which we remove as much carbon from the atmosphere as we put in. The reaction has been mixed, ranging from endorsements from fellow politicians in the Conservative Party to criticism from opposition parties and environmental groups. The business community is also split. So why has Mr Sunak changed his policies on climate change - and why now? Gaia Vince speaks to Ian Dunt, editor of politics.co.uk We hear about an astonishing finding by archaeologists who have discovered expertly manufactured interlocking wooden structural parts that are half a million years old. What do they tell us about our early human ancestors in Africa? Gaia speaks to Professor of Archaeology Laurence Barham and Professor of Geography Geoff Duller about their extraordinary discovery. Approximately two billion tonnes of du