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E.g., 06/24/2019
Your search has returned 332 images:
  • Deep Space Atomic Clock illustration
  • body-on-a-chip
  • diamond
Your search has returned 1999 articles:
  • News

    How NASA’s portable atomic clock could revolutionize space travel

    Traveling the solar system could one day be as easy as taking a bus to work. Scientists envision self-driving spaceships ferrying astronauts through deep space, and GPS-like systems guiding visitors across the terrains of other planets and moons. But for those futuristic navigation schemes, spacecraft and satellites would need to be equipped with clocks that keep time with extreme precision —...

    06/21/2019 - 07:00 Technology, Planetary Science
  • News in Brief

    This body-on-a-chip mimics how organs and cancer cells react to drugs

    A new body-on-a-chip system could provide a more holistic view of drug effects than other devices of its kind.

    Unlike traditional organ-on-a-chip devices that simulate a single organ (SN: 3/17/18, p. 13), the new setup contains five chambers to house different types of cells, connected by channels that circulate a nutrient solution to mimic blood flow. This is the first organ-on-a-chip...

    06/19/2019 - 14:00 Biophysics, Technology, Cells
  • News in Brief

    Diamond detectors could aid the search for dark matter

    A new idea for detecting dark matter really sparkles.

    Diamonds could be used to search for the mysterious substance, a team of scientists suggests. Detectors containing the crystals could spot potential dark matter particles with relatively low masses, the researchers report in the June 15 Physical Review D.

    Dark matter is an unidentified substance that scientists think must exist...

    06/17/2019 - 08:00 Particle Physics, Technology
  • 50 years ago, scientists wanted to build solar panels on the moon

    Solar power from moon to Earth —

    An almost unlimited supply of electricity could be generated on the moon’s surface by huge arrays of solar cells and beamed to Earth by laser. Sunlight falling on a crater … could produce from 10,000 to 100,000 megawatts of power. By comparison, a large hydroelectric dam on Earth produces about 100 megawatts. Solar cells would be more efficient on...

    06/07/2019 - 08:00 Astronomy, Technology, History of Science
  • News in Brief

    This tabletop device turns the quantum definition of a kilogram into a real mass

    It’s mass for the masses.

    A tabletop device makes the new definition of the kilogram more accessible. Previously, the kilogram had been equal to the mass of a special metal cylinder kept in a vault near Paris. But researchers did away with that standard on May 20, pegging the kilogram instead to a quantum mechanical number known as the Planck constant (SN Online: 5/20/19).

    Using...

    06/03/2019 - 07:00 Physics, Technology
  • News

    A new optical atomic clock’s heart is as small as a coffee bean

    Portable atomic clocks are on their way to an upgrade.

    Today’s small, battery-operated atomic clocks track time by counting oscillations of light absorbed by cesium atoms (SN: 9/4/04, p. 50). That light oscillates billions of times per second. Now, a miniature version of a type of atomic clock called an optical clock uses light tuned to rubidium atoms, and beats trillions of times per...

    05/28/2019 - 08:00 Physics, Technology
  • News in Brief

    Spherical flames in space could solve the mystery of soot-free fires

    Solving this burning question requires starting fires in space.

    Ongoing experiments on the International Space Station could help resolve a scientific debate about why some fires burn without producing soot. Made of carbon particles created when fuel fails to burn completely, soot is a pollutant. The particles are linked to health issues, including cancer (SN: 8/4/07, p. 69), and...

    05/23/2019 - 09:00 Physics, Technology
  • Feature

    The search for new geologic sources of lithium could power a clean future

    The future of lithium is electrifying. Cars and trucks powered by lithium batteries rather than fossil fuels are, to many people, the future of transportation. Rechargeable lithium batteries are also crucial for storing energy produced by solar and wind power, clean energy sources that are a beacon of hope for a world worried about the rapidly changing global climate.

    Prospecting for new...

    05/07/2019 - 14:09 Earth, Technology, Sustainability
  • News

    Facebook data show how many people left Puerto Rico after Hurricane Maria

    Hurricane Maria sent Puerto Ricans fleeing from the island to the U.S. mainland, but population surveys to assess the size of that migration would have taken at least a year to complete. A new study suggests, however, that a Facebook tool for advertisers could provide crude, real-time estimates for how many people are moving because of a natural disaster. That could help governments design...

    05/03/2019 - 07:00 Science & Society, Technology, Computing
  • News

    How scientists took the first picture of a black hole

    Black holes are extremely camera shy. Supermassive black holes, ensconced in the centers of galaxies, make themselves visible by spewing bright jets of charged particles or by flinging away or ripping up nearby stars. Up close, these behemoths are surrounded by glowing accretion disks of infalling material. But because a black hole’s extreme gravity prevents light from escaping, the dark...

    04/10/2019 - 09:57 Astronomy, Physics, Technology