ALTHOUGH it may defy all reason, it should surprise no one that the price of bitcoin, a cryptocurrency, has just passed $11,000. Bitcoin’s ascent has been dizzying: four days ago it was worth less than $9,000 and a year ago it was worth less than $800.
IT IS a stunt worthy of Evel Knievel. This week, if all goes to plan, “Mad” Mike Hughes, a Californian, will launch himself 1,800 feet (550 metres) into the sky in a homemade steam-powered rocket made of scrap metal. As well as providing entertainment, Mr Hughes wants to prove a point.
PARENTS these days spend a lot more time with their offspring, or at least middle-class parents do. One analysis of 11 rich countries estimates that the average mother spent 54 minutes a day caring for children in 1965 but 104 minutes in 2012.
GENDER bias can be hard to measure, especially when it comes in subtle forms. A recently published working paper by Heather Sarsons of Harvard University provides an unusually clear example. It shows that, with all other factors held constant, the gender of surgeons influences how likely doctors are to refer patients to them.
It is hard not to be impressed — and perhaps a little alarmed — by the progression. In 1997, IBM’s supercomputer Deep Blue beat the world’s greatest chess player, Garry Kasparov. It was a hugely expensive piece of hardware, closely tended and coached by humans. Go is a far harder game for computers to master […]