A paralysed man in Australia has become the first person to tweet a message via direct thought thanks to a tiny brain implant the size of a paperclip. Philip O'Keefe, 62, who suffers from amyotrophic lateral sclerosis (ALS) which has left him unable to move his upper limbs, tweeted: 'No need for keystrokes or voices. I created this tweet just by thinking it.' #helloworldbci He was diagnosed with ALS, a ...