Why can you recognise that woman, from that thing... but can't remember her name? And why, after your last break-up, did you find yourself in the foetal position on the sofa for days, moving only to wipe the snot and tears haphazardly from your face? From the hugely popular Guardian science blogger, a surprising, funny and mind-bending examination of how and why the brain sabotages our behaviour. A Neuroscientist Explains What Your Head is Really Up To.