Researchers have discovered a previously unknown mechanism for wear in metals: a swirling, fluid-like microscopic behaviour in a solid piece of metal sliding over another.
A bill calling for a moratorium on fracking until more is known about its environmental impact has been defeated in the House of Commons. Which statement best reflects your opinion on this?
Think of the Falklands crisis and ask yourself if it could have been won without aircraft, warships, and guided weapons.
