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E.g., 09/26/2017
E.g., 09/26/2017
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Your search has returned 119 articles:
  • 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
  • News

    Normally aloof particles of light seen ricocheting off each other

    Cross two flashlight beams and they pass right through one another. That’s because particles of light, or photons, are mostly antisocial — they don’t interact with each other. But now scientists have spotted evidence of photons bouncing off other photons at the Large Hadron Collider at CERN, the European particle physics lab in Geneva.

    “This is a very basic process. It’s never been...

    08/14/2017 - 11:00 Particle Physics
  • News in Brief

    Neutrino experiment may hint at why matter rules the universe

    A new study hints that neutrinos might behave differently than their antimatter counterparts. The result amplifies scientists’ suspicions that the lightweight elementary particles could help explain why the universe has much more matter than antimatter.

    In the Big Bang, 13.8 billion years ago, matter and antimatter were created in equal amounts. To tip that balance to the universe’s...

    08/08/2017 - 14:00 Particle Physics
  • News

    Neutrinos seen scattering off an atom’s nucleus for the first time

    Famously sneaky particles have been caught behaving in a new way.

    For the first time, scientists have detected neutrinos scattering off the nucleus of an atom. The process, predicted more than four decades ago, provides a new way to test fundamental physics. It will also help scientists to better characterize the neutrino, a misfit particle that has a tiny mass and interacts so feebly...

    08/03/2017 - 14:10 Particle Physics
  • News in Brief

    Newfound particle relies on its charm(s)

    A newly discovered particle is dishing out a double dose of charm.

    The newcomer is a baryon, meaning that it’s composed of three smaller particles called quarks — in this case, two “charm” quarks and one “up” quark. Detected by the LHCb experiment at CERN, the European physics laboratory near Geneva, the baryon is the first to be discovered with two charm quarks, LHCb scientists reported...

    07/07/2017 - 12:23 Particle Physics
  • Letters to the Editor

    Readers intrigued by Mars' far-out birth

    Martian mysteries

    Mars may have formed out where the asteroid belt is now, far from its planetary neighbors, Thomas Sumner reported in “New proposal reimagines Mars’ origin” (SN: 5/27/17, p. 14).

    Readers online were fascinated by Mars’ origin story. “There seemed to be evidence of actual seas on early Mars,” stargene wrote. “How can this be finessed into the idea of Mars living out in...

    07/06/2017 - 12:30 Planetary Science, Genetics, Particle Physics
  • Letters to the Editor

    Readers puzzled by proton's properties

    Proton puzzler

    Uncertainty over the proton’s size, spin and life span could have physicists rethinking standard notions about matter and the universe, Emily Conover reported in “The proton puzzle” (SN: 4/29/17, p. 22).

    Readers wondered about the diameter (or size) of the proton, which has three fundamental particles called quarks rattling around inside. “Still scratching my head over how...

    05/31/2017 - 15:45 Particle Physics, Climate, Planetary Science