Humans could download their brain on to a computer and live forever inside a machine, a Cambridge neuroscientist has claimed. Dr Hannah Critchlow said that if a computer could be built to recreate the 100 trillion connections in the brain it would be possible to exist inside a programme.Dr Critchlow, who spoke at the Hay Festival on "busting brain myths" said that, although the brain was enormously complex, it worked like a large circuit board and scientists were beginning to understand the function of each part.Asked if it would be possible one day to download consciousness onto a machine, she said: "If you had a computer that could make those 100 trillion circuit connections then that circuit is what makes us us, and so, yes, it would be possible."People could probably live inside a machine. I think it is definitely a possibility."Dr Critchlow also said it was a myth that humans only used 10% of their brains.She said: "The brain weighs about 1.5kg - and comprises about 2% of the body - and yet it is greedy and takes about 20% of all energy consumption."But Dr Critchlow said there was some evidence left-handed people really are more creative.Recent studies have shown that stimulating the right brain hemisphere, which is more active in left-handed people, improves creative thought...