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The linear écraseur chain - developed in Paris in 1850 for amputating limbs and tumours, and for castration - works by the gradual tightening of the chain loop, crushing tissue without causing bleeding.

19 May

Hundreds of academics, writers and other campaigners from across the world have signed a "manifesto" calling on the coalition government and UK universities to reverse policies that they say are leading to the commercialisation of higher education.