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Dr Manish Patel is the Co-Principal Investigator of the NOMAD instrument on the ExoMars Trace Gas Orbiter mission. He’s an expert in Mars’s atmosphere and explains why it’s cold despite being 95% carbon dioxide, a greenhouse gas. He also tells Marnie Chesterton how it would feel to stand at the surface of the Red Planet during a Martian dust storm. (Photo: Astronaut walking on Mars. Credit: Getty Images)