Ewan MacKenna: Real Madrid have now had 19 managers in 20 years.

Can last week’s appointment of their former star Zidane rescue them from ignominy?

Zinedine Zidane has become Real Madrid's 19th manager in 20 years.

Back in the 1930s, five students at Cal Tech were trying to concoct jet fuel when they nearly burned down their dormitory. They’d already been expelled once after a similar mishap, only for their continued efforts in the desert to earn them an invite back. This time, the university saw a better solution. Rather than boot them out again, they were moved to a nearby farm and told to keep on experimenting. Cal ...