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We summarize the week's scientific breakthroughs every Thursday.

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  1. Animals

    Watch a desert kangaroo rat drop-kick a rattlesnake

    Desert kangaroo rats have a wide arsenal for dodging rattlesnake ambushes. But the most dramatic might be their powerful midair kick.

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  2. Animals

    Chytrid’s frog-killing toll has been tallied — and it’s bad

    Losses due to the amphibian-killing chytrid fungus are “the greatest documented loss of biodiversity attributable to a pathogen,” researchers find.

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  3. Animals

    Geneticists close in on how mosquitoes sniff out human sweat

    A long-sought protein proves vital for mosquitoes’ ability to detect lactic acid, a great clue for finding a human.

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  4. Science & Society

    The science of CBD lags behind its marketing

    Editor in Chief Nancy Shute discusses the lack of scientific research on CBD.

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  5. Science & Society

    The CBD boom is way ahead of the science

    As CBD-laced foods and health products gain popularity, researchers are just beginning to fill the gaping holes in knowledge about this cannabis molecule’s benefits.

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  6. Health & Medicine

    Epileptic seizures may scramble memories during sleep

    Overnight seizures seemed to muddle memories in people with epilepsy.

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  7. Health & Medicine

    A single sweaty workout may boost some people’s memory

    Memory improvements after a short bout of exercise mirrored those seen after months of training.

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  8. Health & Medicine

    Signs of new nerve cells spotted in adult brains

    A study finds new evidence that adult brains grow new nerve cells, even the brain of an octogenarian.

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  9. Paleontology

    Saber-toothed cats were fierce and family-oriented

    New details shift the debate on whether Smilodon lived and hunted in packs, and answer questions about other behaviors and abilities.

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  10. Neuroscience

    Women have a new weapon against postpartum depression, but it’s costly

    The newly approved drug brexanolone simulates a natural hormone to alleviate symptoms of postpartum depression.

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  11. Paleontology

    Newfound fossils in China highlight a dizzying diversity of Cambrian life

    A new treasure trove of Cambrian fossils in China dating to 518 million years ago could rival Canada’s Burgess Shale.

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  12. Health & Medicine

    A new ketamine-based antidepressant raises hope — and questions

    Little is known about the long-term effects on people of a newly approved antidepressant based on the anesthetic ketamine.

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