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Have you ever why everyone's nose is a different shape? Researchers have up with a possible explanation for this. A study from Pennsylvania State University in the USA says the Earth's climate could something to with the shape of our nose. The study that people who have wider noses usually in warmer, more humid areas. People with narrower noses are more commonly in colder and drier climates. The nose an important function in making sure the air we breathe our lungs in a warm and moist condition. The width of the nostrils and length of the nose to make sure this happens. Researchers said the nose is a little like a temperature controller.

The researchers 3D images to the noses of more than 2,600 people from Africa, Asia and Europe. They the width of the nostrils, the distance between nostrils and nose height. The researchers said their findings could people who move to different climates to to the heat or cold, and the humidity. This could help reduce respiratory problems. Study co-author Dr Arslan Zaidi said increased travel and climate change it difficult to if our nose will change shape in the future. He said: "Our lifestyles aren't what they used to . We around the world way too much. That it very complicated to predict the future [evolution] of the nose with the changing climate."

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