Linguists, cognitive scientists, behavioral ecologists and theoretical biologists offer disparate views in the emerging field of language evolution.

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An experimental brain-machine interface has allowed a quadriplegic person to control a computer in what could be an early step to new assistive technologies for the disabled.

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An pill-sized brain chip has allowed a quadriplegic man to check e-mail and play computer games using his thoughts. The device can tap into a hundred neurons at a time, and is the most sophisticated such implant tested in humans so far.

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