91Èȱ¬

It is claimed that Egyptians have taken part in the biggest uprising the world has ever seen. The nationwide demonstrations, which were followed by the removal of President Mohamed Morsi by the army, were certainly a massive show of people power. But were the crowds really as large as reported? Ruth Alexander assesses the evidence with the help of Middle East correspondent, Wyre Davies and 91Èȱ¬ Monitoring’s Chris Greenway.

But how do you count a crowd? Hannah Fry, mathematician and researcher of complexity theory from University College London, outlines the different methods – and their shortcomings.