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  1. Readers ask about Microraptors, an X-ray map of the sky and more

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  2. Animals

    Cheap, innovative venom treatments could save tens of thousands of snakebite victims

    Momentum is building to finally tackle a neglected health problem that strikes poor, rural communities.

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  3. Health & Medicine

    What will happen when COVID-19 and the flu collide this fall?

    As the Northern Hemisphere braces for a coronavirus-flu double hit, it’s unclear if it’ll be a deadly combo or one virus will squeeze out the other.

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  4. Environment

    What we know and don’t know about wildfire smoke’s health risks

    As wildfires become more frequent and severe in California, Oregon and throughout the West Coast, concerns rise about harmful air pollution.