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  1. Chemistry

    How to brew a better espresso, according to science

    To make more consistent and affordable espresso shots, use fewer beans and grind them more coarsely, a new study says.

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  2. Paleontology

    A squid fossil offers a rare record of pterosaur feeding behavior

    150 million years ago, a pterosaur attempted to snatch a squid from the ocean surface and lost a tooth in the process.

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  3. Pain opens the door for dubious stem cell treatments

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  4. Readers comment on penguin sex, math and more

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  5. Health & Medicine

    How one woman became the exception to her family’s Alzheimer’s history

    A single mutation in a woman who evaded Alzheimer’s may point to new ways to treat the disease.

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  6. Health & Medicine

    How the new coronavirus stacks up against SARS and MERS

    Coronaviruses are a diverse family that may be becoming more threatening to people.

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  7. Health & Medicine

    Levels of certain proteins in the blood may act as concussion biomarkers

    College athletes who suffered concussions had elevated blood levels of three proteins, a potential chemical sign that one day may aid diagnosis.

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  8. Health & Medicine

    No, snakes probably aren’t the source of that new coronavirus in China

    Scientists are skeptical about a new study that pinpoints snakes as the animal reservoir for the ongoing coronavirus outbreak in China.

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  9. Physics

    A quantum strategy could verify the solutions to unsolvable problems — in theory

    A quantum technique for verifying solutions to difficult problems could apply to an “unbelievably huge” class of puzzles.

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  10. Health & Medicine

    WHO says China’s coronavirus outbreak isn’t a global emergency yet

    While the WHO says the coronavirus outbreak isn’t a global emergency, China has locked down several large cities to stop the virus from spreading.

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  11. Archaeology

    A 3-D printed vocal tract lets an ancient mummy speak from beyond the grave

    A re-created version of a mummy’s vocal tract reveals what this ancient Egyptian might have sounded like.

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  12. Life

    Sparkly exoskeletons may help camouflage beetles from predators

    Iridescence, normally thought to help insects stand out, can also camouflage beetles from predators, according to new experimental evidence.

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