Revolt Against South Africa's Jacob Zuma

There is turmoil within the governing ANC party after President Jacob Zuma fired the widely respected Finance Minister, Pravin Gordhan. Deputy President Cyril Ramaphosa has described the sacking as "totally unacceptable". Also in the programme: China pledges to close down the ivory industry; and does dark energy really exist?

(Photo: Hundreds of people protest outside the South African Parliament, against the dismissal of the finance minister Pravin Gordhan. Credit: Rodger Bosch/AFP/Getty Images)