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Using Gold Nanoparticles to Rapidly Detect Cancer DNA

Using as little as 1 picogram of purified DNA sample (think 2.5 trillion times lighter than a penny), scientists at the University of Brisbane have developed a method that permits the swift detection of cancer DNA in a patient sample of cell-free DNA, which circulates systemically. These researchers took advantage …

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Voyager 2 Reaches Interstellar Space

Forty-one years after it launched into space, NASA’s Voyager 2 spacecraft has crossed the outer edge of the heliosphere. Called the heliopause, this boundary is where the tenuous, hot solar wind meets the cold, dense interstellar medium. Voyager 2’s twin probe, Voyager 1, crossed this boundary in 2012, but Voyager …

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OSIRIS-REx Finds Water-Bearing Minerals on Asteroid Bennu

New data from two instruments on NASA’s OSIRIS-REx spacecraft — the OSIRIS-REx Visible and Infrared Spectrometer (OVIRS) and the OSIRIS-REx Thermal Emissions Spectrometer (OTES) — reveal the presence of hydroxyls, molecules that contain oxygen and hydrogen atoms bonded together, on the surface of asteroid Bennu. According to the mission science …

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