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Your search has returned 125 articles:
  • News

    Universes with no weak force might still have stars and life

    Not all fundamental forces are created equal. An alternate universe that lacks the weak nuclear force — one of the four fundamental forces that govern all matter in our universe — could still form galaxies, stars, planets and perhaps life, according to calculations published online January 18 at arXiv.org.

    Scientists have long thought that our universe wouldn’t exist, or at least wouldn’...

    01/30/2018 - 07:00 Astronomy, Cosmology, Particle Physics
  • News

    Clumps of dark matter could be lurking undetected in our galaxy

    Clumps of dark matter may be sailing through the Milky Way and other galaxies.

    Typically thought to form featureless blobs surrounding entire galaxies, dark matter could also collapse into smaller clumps — similar to normal matter condensing into stars and planets — a new study proposes. Thousands of collapsed dark clumps could constitute 10 percent of the Milky Way’s dark matter,...

    01/26/2018 - 09:00 Particle Physics, Cosmology
  • News

    Mysterious high-energy particles could come from black hole jets

    It’s three for the price of one. A trio of mysterious high-energy particles could all have the same source: active black holes embedded in galaxy clusters, researchers suggest January 22 in Nature Physics.

    Scientists have been unable to figure out the origins of the three types of particles — gamma rays that give a background glow to the universe, cosmic neutrinos and ultrahigh energy...

    01/22/2018 - 15:48 Astronomy, Particle Physics
  • News

    Magnets with a single pole are still giving physicists the slip

    Magnetic poles are seemingly inseparable: Slice a magnet in half, and you get two smaller magnets, each with its own north and south poles. But exotic magnetic particles that flout this rule may be lurking undetected, some physicists suspect.

    The hunt is in full swing for these hypothetical particles known as magnetic monopoles — which possess a lone north or south pole. Now, two groups...

    01/09/2018 - 13:00 Particle Physics
  • News

    Excess antielectrons aren’t from nearby dead stars, study says

    New observations of the whirling cores of dead stars have deepened the mystery behind a glut of antimatter particles raining down on Earth from space.

    The particles are antielectrons, also known as positrons, and could be a sign of dark matter — the exotic and unidentified culprit that makes up the bulk of the universe’s mass. But more mundane explanations are also plausible: Positrons...

    11/16/2017 - 14:19 Particle Physics
  • Letters to the Editor

    Readers question photons colliding, black sea snakes and more

    Brain boost

    It’s possible that therapies such as external brain stimulation and neurofeedback, as well as some drugs, may one day boost brain flexibility. A new line of research suggests flexibility is important for learning, Laura Sanders reported in “Learning takes brain acrobatics” (SN: 9/16/17, p. 22).

    Online reader Glenn wondered if drugs for Parkinson’s disease and Huntington’s...

    10/18/2017 - 12:15 Particle Physics, Animals, Neuroscience
  • News

    Ultrahigh energy cosmic rays come from outside the Milky Way

    View the video

    The largest study yet of the most energetic particles to slam into Earth provides the first solid clues to where the particles come from. Using a giant array of tubs of water, scientists found that these ultrahigh energy cosmic rays mostly originate outside the Milky Way.

    An international team analyzed about 12 years of data to show that particles with energies above...

    09/21/2017 - 14:00 Astronomy, Particle Physics
  • News

    The sun’s strongest flare in 11 years might help explain a solar paradox

    A series of rapid-fire solar flares is providing the first chance to test a new theory of why the sun releases its biggest outbursts when its activity is ramping down. Migrating bands of magnetism that meet at the sun’s equator may cause the biggest flares, even as the sun is going to sleep.

    A single complex sunspot called Active Region 2673 emitted seven bright flares — powerful bursts...

    09/11/2017 - 16:30 Astronomy, Particle Physics
  • Science Ticker

    The results from a slew of experiments are in: Dark matter remains elusive

    Patience is a virtue in the hunt for dark matter. Experiment after experiment has come up empty in the search — and the newest crop is no exception.

    Astronomical observations hint at the presence of an unknown kind of matter sprinkled throughout the cosmos. Several experiments are focused on the search for one likely dark matter candidate: weakly interacting massive particles, or WIMPs....

    09/06/2017 - 08:00 Particle Physics
  • News in Brief

    Dark matter still remains elusive

    Patience is a virtue in the hunt for dark matter. Experiment after experiment has come up empty in the search — and the newest crop is no exception.

    Observations hint at the presence of an unknown kind of matter sprinkled throughout the cosmos. Several experiments are focused on the search for one likely dark matter candidate: weakly interacting massive particles, or WIMPs (SN: 11/12/16...

    09/06/2017 - 08:00 Particle Physics