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    An Army of Micro-Robots can wipe out Dental Plaque

    April 27, 2019, Categories  Health/Medical, Biology/Biotechnology

    With a precise, controlled movement, microrobots cleared a glass plate of a biofilm, as shown in this time-lapse image.
    Credit: Geelsu Hwang and Edward Steager/University of Pennsylvania

    A visit to the dentist typically involves time-consuming and sometimes unpleasant scraping with mechanical tools to remove plaque from teeth. What if, instead, a dentist could deploy a small army of tiny robots to precisely and non-invasively remove that buildup?

    A team of engineers, dentists, and biologists from the University of Pennsylvania developed a microscopic robotic cleaning crew...

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    Bridge over coupled waters: Scientists 3D-print all-liquid ‘Lab on a Chip’

    April 27, 2019, Categories  Biology/Biotechnology, Health/Medical, Chemistry/Nanotechnology

    To make the 3D-printable fluidic device, Berkeley Lab researchers designed a specially patterned glass substrate. When two liquids – one containing nanoscale clay particles, another containing polymer particles – are printed onto the substrate, they come together at the interface of the two liquids and within milliseconds form a very thin channel or tube about 1 millimeter in diameter.
    Credit: Berkeley Lab

    Researchers at DOE’s Lawrence Berkeley National Laboratory (Berkeley Lab) have 3D-printed an all-liquid device that, with the click of a button, can be repeatedly reconfigured on demand to serve a wide range of applications – from making battery materials to screening drug candidates.

    “What we demonstrated is remarkable...

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    Scientists discover what powers celestial phenomenon STEVE

    April 27, 2019, Categories  Astronomy/Space

    Amateur astronomer’s photograph used in the new research. The photograph was taken on May 8, 2016, in Keller, Wash. The major structures are two bands of upper atmospheric emissions 160 kilometers (100 miles) above the ground, a mauve arc and green picket fence. The black objects at the bottom are trees. The background star constellations include Gemini and Ursa Major.
    Credit: Rocky Raybell

    The recently-discovered atmospheric glow is both like typical auroras and distinct from them. The celestial phenomenon known as STEVE is likely caused by a combination of heating of charged particles in the atmosphere and energetic electrons like those that power the aurora, according to new research...

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    New Hubble Measurements Confirm Universe is Expanding Faster than Expected

    April 26, 2019, Categories  Astronomy/Space

    This is a ground-based telescope’s view of the Large Magellanic Cloud, a satellite galaxy of our Milky Way. The inset image, taken by the Hubble Space Telescope, reveals one of many star clusters scattered throughout the dwarf galaxy.
    Credit: NASA, ESA, Adam Riess, and Palomar Digitized Sky Survey

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    The new measurements, published April 25 in the Astrophysical Journal Letters, reduce the chances that the disparity is an accident from 1 in 3,000 to only 1 in 100,000 and suggest that new physics may be needed to better understand the cosmos.

    “This mismatch has been growing and has now reached a point that is really impossible to dismiss as a fluke...

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