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

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