Coronavirus: How confident can we be about the new figures?

A sharp increase in the number of cases and the number of deaths from the coronavirus outbreak in China.
Also in the programme: as the numbers of those fleeing the chaos and carnage in north-west Syria grow, we hear from the head of a major aid agency. And new data proving that our planet formed more with a gentle clump than a violent thump.

(Photo: Man on a motorbike in Shanghai. Credit: AFP)