Dinosaur teeth have ancient air trapped inside of them

Russian President Vladimir Putin’s long-held iron grip on power is being challenged by the war in Ukraine and his government’s authoritarian crackdowns. He finds himself in unfamiliar political territory, publicly questioned by some of the country’s elite and embarrassed by Ukraine’s successful strikes deep into Russian cities. Could there be someone to replace Putin? To answer that question, host Nick Schifrin traveled to London to speak with Arkady Ostrovsky, the Russia editor of The Economist