Birthdays shared
Famously, in a group of 23 randomly chosen people, the chance is slightly higher than 50 per cent that two will share a birthday. In 2014, James Fletcher considered the birth dates of players in the World Cup, who were conveniently organised into squads of 23 people each. He found that 16 of the 32 squads had at least one shared birthday. If data from 2010 World Cup was included, 31 of 64 squads had shared birthdays, still quite close to 50 per cent. If a group numbers 366 people, the probability of a shared birthday is 100 per cent (neglecting leap years). But to reach 99 per cent certainty we need only 55 people. "It is almost unbelievable that such a small difference between the probabilities 99 per cent and 100 per cent can lead to such a big difference between the numbers of people," writes Gabor Szekely in Paradoxes in Probability Theory and Mathematical Statistics (1986). (Via Futility Closet)
Musical accompaniment
"Recently there was obviously something pretty serious going on in our vicinity with an ambulance, and three police cars, including two detectives in attendance at a house for around 1.5 hours," explains Juliet. "Intermittently officers would come back and forth between car and house. The funny thing was that the local very impressive brass band and orchestra whose practice rooms faced the other way were playing incredibly dramatic and tense movie like background music for the entire time. I thought it was very funny but serious and wonder if the cops had noticed the dramatic music and found it odd!"