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  1. Ecosystems

    How an invasive ant changed a lion’s dinner menu

    An invasive ant is killing off ants that defend trees from elephants. With less cover, it’s harder for lions to hunt zebras, so they hunt buffalo instead.

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  2. Physics

    A predicted quasicrystal is based on the ‘einstein’ tile known as the hat

    The einstein tile can cover an infinite plane only with a nonrepeating pattern. A material based on it has features of both crystals and quasicrystals.

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  3. Animals

    A bird flu outbreak is sweeping the globe. Its long-term effects are unclear

    A reporter’s recent trip to the Galápagos offered a chance to reflect on the bird flu outbreak, which has killed millions of birds and other animals.

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  4. Earth

    Many but not all of the world’s aquifers are losing water

    Many aquifers are quickly disappearing due to climate change and overuse, but some are rising because of improved resource management.

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  5. Physics

    What happens when lawn sprinklers suck in water? Physicists answer that quirky question

    Experiments with a floating sprinkler and laser-illuminated microparticles revealed the surprisingly complex physics behind a simple question.

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  6. Life

    Some honeybees in Italy regularly steal pollen off the backs of bumblebees

    New observations suggest that honeybees stealing pollen from bumblebees may be a crime of opportunity, though documentation of it remains rare.

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  7. Plants

    This first-of-its-kind palm plant flowers and fruits entirely underground

    Though rare, plants across 33 families are known for subterranean flowering or fruiting. This is the first example in a palm.

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  8. Life

    These snails give live birth, and it’s the babies that may do the labor

    Protecting eggs in mom’s body may have given rough periwinkle snails an advantage over egg-laying cousins, letting them spread to far more coastline.

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  9. Life

    Megalodon, the largest shark ever, may have been a long, slender giant

    The ancient shark is typically imagined with the scaled-up stout frame of a modern great white. But in life, the giant may have been more elongated.

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  10. What a parrot knows, and what a chatbot doesn’t

    Editor in chief Nancy Shute discusses AI chatbots' vulnerabilities and the intelligence of parrots.

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  11. Readers discuss marathoners’ myelin, menopausal chimps and more

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  12. Physics

    50 years ago, timekeepers deployed the newly invented leap second

    After more than 50 years, metrologists will stop using the leap second to align the time kept by atomic clocks with the rate of Earth’s spin.

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