An old NASA idea for keeping astronauts cool could finally become reality. U.S. high school students recently won $5,000 to make spacesuit undergarments using materials that can absorb heat without changing temperature, Space.com reports. Today's NASA astronauts must wear stretchy underwear with 300 feet of tubes carrying chilled water to avoid overheating during long spacewalks. The students from West Salem High School in Oregon proposed making lighter undergarments by using
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