The workings of the solar system were once likened to the machinations of a precise clock, but the orbits of the planets haven’t always been so perfectly balanced. How did the planets end up where they are today? Also, the Mars missions which hopes to reveal life on the red planet. And, designer and technologist John Maeda on the importance of understanding machines. Kenneth Cukier hosts Please subscribe to The Economist for full access to print, digital and audio editions:www.economist.com/radiooffer For information regarding your data privacy, visit acast.com/privacy

See acast.com/privacy for privacy and opt-out information.