Professor and filmmaker Peter Byck says lessons from ancient bison herds can make cattle farming less of a climate disaster and more profitable. Merryn speaks to him about his latest 4-part documentary series "Roots So Deep (you can see the devil down there)" and the future of farming.

Cambridge Professor Helen Thompson on the Iran War, Energy Markets and Britain’s Risks
30:47

Active vs Passive: How to Help Your Kids Invest
10:26

Why Investors Are Rotating Into Commodities with BlackRock's Evy Hambro
35:22