On the face of it, fuel cells are an extremely attractive energy alternative, typically using oxygen and hydrogen as fuel, and producing only water and heat as by-products. This is an excellent value proposition in terms of environmental impact, but in practice, fuel cells have been a long time coming. For well over a decade,..

Although Google Glass, the so-called ‘augmented reality’ head-mounted display (HMD) being developed by Google at the semi-secret Google X Lab, has received a lot of publicity, especially of a ‘gee whiz’ variety, clear succinct accounts of how ‘Glass’ functions have been hard to come by. This article is an attempt to cut through some of..