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  1. Readers discuss the 1921 Tulsa race massacre, zombie fires and more

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  2. Chemistry

    50 years ago, scientists developed self-destructing plastic

    In the 1970s, scientists developed plastic that could quickly break down when exposed to light. But that didn’t solve the world’s pollution problems.

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  3. Health & Medicine

    What science tells us about reducing coronavirus spread from wind instruments

    Performers struggled to find evidence that would free them from musical lockdown, so they partnered with researchers to get some answers.

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  4. Animals

    Squirrels use parkour tricks when leaping from branch to branch

    Squirrels navigate through trees by making rapid calculations to balance trade-offs between branch flexibility and the distance between tree limbs.