The brakes produce a deceleration of 10 metres per second.

As any producer knows, a good leading man can make all the difference. Mr Chapek turned out to be a B-lister; Mr Iger, who transformed Disney’s fortunes, is a corporate megastar.

While failing to make a diagnosis can result in lawsuits, there are no corresponding penalties for overdiagnosis.

But you don’t have to be a scientist to be a potamophile (someone who loves rivers). Anyone can exercise his potamophily (love of rivers) and his legs along the bank of his favorite river.