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  1. Long COVID brings another huge challenge to science

    Editor in chief Nancy Shute discusses the challenges of long COVID and what it takes to report on it.

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  2. Readers discuss the search for dark matter and 25 years of Mars rovers

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  3. Animals

    Mountain lions pushed out by wildfires take more risks

    A study tracking mountain lions showed that after an intense burn, the big cats crossed roads more often, raising the risk of becoming roadkill.

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  4. Astronomy

    Meet the BOAT, the brightest gamma-ray burst of all time

    Probably triggered by a supernova in a remote galaxy, the burst detected on October 9 could challenge theories about these brilliant blasts.