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  1. Plants

    Cactus spine shapes determine how they stab victims

    The shapes of cactus spines influence how they poke passersby.

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  2. Planetary Science

    NASA’s InSight lander has touched down safely on Mars

    NASA’s InSight lander just touched down on Mars for a years-long study of the Red Planet’s insides.

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  3. Animals

    How locust ecology inspired an opera

    When an entomologist decides to write a libretto, you get an operatic elegy to locusts.

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  4. Particle Physics

    Physicists finally calculated where the proton’s mass comes from

    New study indicates that the proton is much more than just the sum of its parts.