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  1. Tech

    Drones help scientists weigh whales at sea

    Drone imagery lets scientists estimate a whale’s weight. And that may help monitor the health of these big mammals for conservation purposes.

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  2. Space

    Explainer: Understanding meteors and meteor showers

    Meteors regularly enter Earth’s atmosphere. Most ‘shooting stars’ pose few risks to life on the ground, but the rare big ones can be lethal.

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  3. Physics

    Tests challenge whether centuries-old violins really are the best ever

    Some centuries-old Italian violins are reputed to be the best ever made. Scientists tested that. Their data now show new instruments can sound at least as good — and sometimes better.

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  4. Brain

    Sleep may jumpstart the brain’s power washing system

    Waves of fluid wash into the human brain during sleep. That’s good. They just may help clean out toxic proteins.

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  5. Physics

    Magnetic fields may supercharge the sun’s release of heat

    Astronomers have linked flame-like tendrils rising from the sun to changes in its magnetic fields. This may be one step toward understanding why the sun’s corona is so very, very hot.

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  6. Climate

    Hotspots found for lightning’s superbolts

    A nine-year survey reveals where and when the most energetic lightning strikes — and it’s not what scientists expected.

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  7. Animals

    Scientists Say: Papillae

    These small nubs stick out from a body part. They include things such as tongue bumps with taste buds and the structures under the skin that help grow hair.

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  8. Animals

    Why are bird eggs in cold climates darker colored?

    A global survey of bird egg color has revealed a simple trend: the colder the climate, the darker the egg.

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  9. Plants

    Scientists look to hack photosynthesis for a ‘greener’ planet

    Photosynthesis turns sunlight into energy for plants. Scientists want to know more about it, imitate it — even improve it.

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  10. Animals

    Piranhas and plant-eating kin replace half their teeth at once

    Piranhas and pacus shed and replace half of their teeth at a time. New teeth lock together as they push up from the jaw.

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