And these troops have rarely been at the centre of the action: in Afghanistan, they stay in the relatively calm north; in Lebanon, they patrol at sea, not on land.

Action 1.2: Develop and run a global awareness-raising and advocacy campaign aiming to put health at the centre of the climate change mitigation and adaptation agenda at the international level.

Simon Mead of the British prion research centre at University College London says the discovery of an "anti-kuru" gene is the most clear-cut evidence yet of human evolution in action.