Sleep therapists correct the syndrome by forcing the advanced phase patients to stay up late and exposing them to bright light around 0230 AM - helping to "manually" reset the clock.

BBC: 'Sleepyhead gene' discovered

It is vitally important that players read what's in front of them in these situations because making the correct decision is critical to controlling the next phase of play and how quickly the ball is recycled after contact.

BBC: Jeremy Guscott column

The Economist can take solace that the original picture showing the waxing phase on the left side of the moon in Rio was indeed correct.

ECONOMIST: Letters