Have you thought why everyone's nose is a shape? Researchers have a explanation for this. A study from Pennsylvania State University says the Earth's climate could change the of our nose. The study found that people with noses usually live in warm, areas. People with narrower noses more live in colder, drier . The nose is important in making sure the air we breathe gets to our in a warm and moist condition. The shape of the nose makes sure this happens. The nose is a little like a controller.
Researchers used 3D to measure the nose width and , and the between the two nostrils of over 2,600 people from Africa, Asia and Europe. The researchers said their study could help people to adjust to the heat or , and the humidity if they travel to or live in countries. It could help with breathing . A researcher said changing lifestyles, travel and climate change make it to predict if our nose will always change shape. He said: "We move around the world too much. That makes it… to predict the future  of the nose."