Sorry, nails-on-chalkboard. The perceived wisdom that you are the worst sound in the world has been upset by a recent Newcastle University showing that the screech produced by a knife scraping a bottle (listen here) is the most unpleasant sound in the world, as determined by MRI scans measuring the brain’s response to 74 different sounds. Interestingly enough, nails on a chalkboard came in fifth--behind chalk on a chalkboard, which ranked third. Hear all these horrible, horrible sounds over at The Telegraph.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.