The Solar Orbiter is on a two year journey towards the sun, the most studied astronomical subject in the sky. What will this new view of the sun reveal? Also, Kenneth Cukier talks to Amy Zegart, who advises American policymakers on cyber-spycraft, about how countries can improve their defence against digital security threats. And, why living in a city impairs navigational skills. 

Please subscribe to The Economist for full access to print, digital and audio editions:

www.economist.com/radiooffer

Hosted on Acast. See acast.com/privacy for more information.