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This week, engineer Adam Wilson made global headlines by updating Twitter using his brainwaves. "USING EEG TO SEND TWEET" he explained.

Compatible with any PC running Windows, it will ship later this year for $299 (see image). They have shown off a game where the player moves stones to rebuild Stonehenge using mind power alone (see video).

Escaping the lab Researchers have developed systems that read brainwaves – in the form of electroencephalogram (EEG) signals – in order to help people suffering from disabilities or paralysis control wheelchairs, play games , or type on a computer. Now, two companies are preparing to market similar devices to mainstream consumers.