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Scientists have out why certain smells feelings of nostalgia and can recall distant memories. The scientists an area of the brain is responsible for assigning memories to smells and for storing them for decades. The area can instantly recall the memories with great clarity years later if a person the smell again. Christina Strauch, from the Ruhr University in Germany, said smells are in the olfactory brain. The word olfactory anything related to the sense of smell. She said: "It is that the piriform cortex is able to temporarily olfactory memories. We wanted to if that to long-term memories as well."

There a multitude of scents that can us back to our childhood. Smells from cookies baking in the oven or the perfume of an elderly aunt can back surprising recollections of growing up. Professor Strauch said certain scents can you away to another point in time. Strauch said some odours can you wish you were actually back in a certain point of time, or you want to escape. She said it on whether or not the smell has a positive or negative association. Aromatherapists partly on this for their patients. Smells can even you to buy things in stores. Many stores introduce fragrances to shoppers to nostalgic memories to buy things they loved years ago.