成人快手

A new online security system to replace passwords, the bugs that live on your phone, tofu to the rescue for cheap solar cells, and why the government banned Qat this week. Plus, how does chanting change the behaviour of a football crowd? Why do free kicks and penalties still come down to good old physics? How can economists use data from the pitch to see whether discrimination still exists in the beatuiful game, and is football hooliganism turning into domestic disputes?