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ninety per cent of our classmates up to thirty B Scientists have reeently carried out tests on volunteers to find out which areas in the brain are involved in face recognition. The tests must have been a lot of fun to take part in! The volunteers were shown a photograph of a famous person on a computer and then the face gradually changed into another famous person's, For example a picture of the 1950s film star Marilvn Monroe slowly changed into a picture of the British Prime Minister Margaret Thatcher! Obviously, Marilyn's beautiful curly blonde hair became grever, her nose became sharper and longer, and her creamy complexion developed wrinkles and lines around the mouth. As they watched the person change, sophisticated equipment scanned the volunteers' brains to see which parts of the brain were lighting up. C The results showed that we use three main areas of the brain to identify people's faces. While one section of the brain looks at the physical aspects such as size and shape of eyes and distinguishing features, another part identities the face as known or unknown, At the same time, a third of the brain is checking out the name or part orher information about the tace in our memory: It sounds amazing bur it seems that human beings can store as many as 10,000 taces in tiheir memories and most of us can recognise abour five years after we last saw them​