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Your search has returned 145 articles:
  • News

    A faint glow found between galaxies could be a beacon for dark matter

    Dim light emanating from the purgatory between galaxies could illuminate the most shadowy constituents of the cosmos.

    Dark matter, an unidentified type of particle that interacts gravitationally but otherwise shuns normal matter, lurks throughout clusters of galaxies. Because the elusive substance emits no light, it’s difficult to pin down how it is distributed, even though it makes up...

    08/10/2018 - 07:00 Astronomy, Particle Physics
  • Letters to the Editor

    Readers question dark fusion, Antarctic ice melting and more

    Melt away

    In the last five years, Antarctica has lost ice nearly three times faster on average than it did over the previous 20 years — largely due to climate change, Laurel Hamers reported in “Antarctica has lost about 3 trillion metric tons of ice since 1992” (SN: 7/7/18, p. 6).

    “Isn’t there a volcano or multiple volcanoes recently found under Antarctica that might also be...

    08/09/2018 - 07:00 Climate, Particle Physics, Microbiology
  • News in Brief

    Hopes dim that gamma rays can reveal dark matter

    An astronomical calling card, tentatively attributed to mysterious dark matter, seems likely to be due to a more mundane source.

    An unexplained glow of high-energy light from the center of the Milky Way, first spotted in 2009, raised scientists’ hopes of better pinning down dark matter (SN: 11/20/10, p. 11). That unidentified substance has been detected so far only via its gravitational...

    08/06/2018 - 11:00 Astronomy, Particle Physics
  • News in Brief

    In a first, physicists accelerate atoms in the Large Hadron Collider

    Not content with protons and atomic nuclei, physicists took a new kind of particle for a spin around the world’s most powerful particle accelerator.

    On July 25, the Large Hadron Collider, located at the laboratory CERN in Geneva, accelerated ionized lead atoms, each containing a single electron buddied up with a lead nucleus. Each lead atom normally has 82 electrons, but researchers...

    07/31/2018 - 13:42 Particle Physics
  • News in Brief

    A new quasiparticle lurks in semiconductors

    There’s a new clique among quantum particles in a semiconductor. 

    Electrons and positively charged holes in the material’s atomic lattice band together to create a tight-knit posse dubbed a collexon, researchers report July 26 in Communications Physics. This new class of quasiparticle — a quantum clan that acts like a single subatomic particle — could help researchers better understand...

    07/26/2018 - 09:00 Particle Physics
  • News in Brief

    One particle’s trek suggests that ‘spacetime foam’ doesn’t slow neutrinos

    An intergalactic race between light and a bizarre subatomic particle called a neutrino has ended in a draw.

    The tie suggests that high-energy neutrinos, which are so lightweight they behave as if they’re massless, adhere to a basic rule of physics: Massless particles travel at the speed of light.

    Comparing the arrival times of a neutrino and an associated blaze of high-energy light...

    07/19/2018 - 07:00 Particle Physics, Astronomy
  • 50 years ago, neutrinos ghosted scientists

    Tracking the neutrino

    The definite detection of nonterrestrial neutrinos, whether from the sun or from beyond the solar system, will yield a far deeper understanding of stellar interiors and, therefore, of how today’s universe came to be. — Science News, July 20, 1968.

    Update

    In May 1968, researchers reported that a particle detector in South Dakota spotted ghostly subatomic...

    07/12/2018 - 16:47 Particle Physics, Astronomy, Technology
  • News

    A high-energy neutrino has been traced to its galactic birthplace

    A zippy little particle has been traced back to its cosmic stomping grounds, a flaring galaxy 4 billion light-years away, for the first time solving a cosmic whodunit.

    Scientists have long puzzled over the sources of high-energy particles from space, which batter the Earth at energies that can outstrip the world’s most advanced particle accelerators. Now, physicists have identified the...

    07/12/2018 - 11:00 Particle Physics, Astronomy
  • Letters to the Editor

    Readers ask about proton pressure, wearable tech and more

    Pressure gauge

    The pressure inside a proton is the highest of any known substance, Emily Conover reported in “The inside of a proton endures more pressure than anything else we’ve seen” (SN: 6/9/18, p. 10).

    “I don’t think it’s valid to think of pressure on a quantum level the same way we do classically,” Reddit user phazer6 wrote. Pressure relates to collections of particles, but “...

    07/11/2018 - 07:15 Particle Physics, Technology, Earth
  • News

    If real, dark fusion could help demystify this physics puzzle

    Fusion may have a dark side. A shadowy hypothetical process called “dark fusion” could be occurring throughout the cosmos, a new study suggests.

    The standard type of fusion occurs when two atomic nuclei unite to form a new element, releasing energy in the process. “This is why the sun shines,” says physicist Sam McDermott of Fermilab in Batavia, Ill. A similar process — dark fusion —...

    06/06/2018 - 09:00 Particle Physics, Astronomy