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  • Potentially habitable planet TRAPPIST-1b may have a carbon dioxide-rich atmosphere


    Potentially habitable planet TRAPPIST-1b may have a carbon dioxide-rich atmosphere

    Potentially habitable planet TRAPPIST-1b may have a carbon dioxide-rich atmosphere

    That haze, the researchers say, causes the planet's upper atmosphere to be hotter than the layers below, creating an environment where carbon dioxide emits light rather than absorbing it, which could explain the lack of an expected dip in previous observations.


    Why is fluoride added to drinking water?

    Why is fluoride added to drinking water?

    "Fluoride was found to significantly reduce tooth decay," Neil Maniar, a professor of public health practice at Northeastern University, told Live Science in an email.


    The spread of breast cancer may be inherited

    The spread of breast cancer may be inherited

    In a large study in Sweden, people who inherited two copies of the spread-associated variant have a 22 percent risk of developing metastasis within 15 years of their original diagnosis, the researchers found.