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Your search has returned 23 images:
  • Europa
Your search has returned 32 articles:
  • Say What?

    Exciton

    Getting excited can kick a person’s energy to a higher level. At the nanoscale, strange almost-particles called excitons do the same trick.

    In a crystal, thin film or even some liquids, an incoming particle of light can slam into an electron, bumping it to a higher energy level and leaving a hole at the energy level where the particle had been. The exciton is the excited electron paired...

    05/02/2014 - 11:30 Physics, Particle Physics
  • The –est

    Loblolly sets record for biggest genome

    A giant among trees, the loblolly pine boasts the largest set of genetic blueprints published to date. Even though it’s big on DNA letters, the pine’s instruction book lacks originality: About 82 percent is made of repeating DNA elements.

    Researchers first reported deciphering loblolly’s roughly 22 billion letters, or bases, at a conference in 2013 (SN Online: 5/16/13). Now, the team has...

    05/01/2014 - 18:59 Paleontology, Plants
  • Anti-leukemia vaccine reported hope of future

    An anti-leukemia vaccine to prevent cancer of the blood-forming organs was reported as a possibility if, as experiments indicate, virus-like particles are proved to cause malignancy.

    The development of such a vaccine is not foreseeable in the immediate future, Dr. W. H. Murphy of the University of Michigan, Ann Arbor, said, but there is basis for “cautious optimism, rather than the...

    05/01/2014 - 15:45 Science & Society, Biomedicine
  • News in Brief

    Mountains on Saturn moon may have come from space

    A mysterious mountain ridge ringing the equator of Saturn’s moon Iapetus may be a load of space rubble.

    Ever since the Cassini spacecraft spied the jagged belt wrapped around Iapetus’ middle in 2004, scientists have debated the ridge’s origin. Some think volcanoes shoved it up from beneath the moon’s surface or that tectonic activity created the range. Others think that the towering...

    04/21/2014 - 17:55 Planetary Science, Astronomy
  • News in Brief

    Blender whips up graphene

    With soap, water, graphite and the whirl of a blender’s blades, researchers can serve up big batches of graphene, a material that shows promise for use in myriad high-tech applications.

    Graphene sheets are single-atom-thick layers of carbon that, when stacked, make up graphite.  Individual sheets are sturdy, transparent and excellent conductors of electricity, giving them enormous...

    04/20/2014 - 13:00 Materials
  • News

    Poor slumber is bad for young flies' brains

    Busy people like to say that the best time to sleep is when you’re dead. But the best time to sleep is actually when you’re young, a study of fruit flies suggests.

    Newly hatched fruit flies deprived of sleep end up with brain and behavior problems later in life, scientists report in the April 18 Science. “This study is a really important advance in our understanding of how sleep and...

    04/18/2014 - 08:30 Neuroscience, Human Development
  • News

    Gene activity sets humans apart from extinct hominids

    Extinct human cousins may have used some genes differently than modern people do, an analysis of Neandertal and Denisovan DNA reveals.

    Compared with living people, Neandertals and ancient Siberians known as Denisovans had slightly different patterns of DNA methylation — a chemical modification of DNA that doesn’t change the information in genes but helps control gene activity....

    04/17/2014 - 14:00 Genetics, Molecular Evolution, Human Evolution
  • News

    Earth-sized planet found in star’s habitable zone

    Earth, meet your distant cousin. The Kepler space telescope has turned up a potentially water-bearing world nearly as small as our planet. The planet is the smallest one found in any star’s habitable zone, a temperate region surrounding a star that is suitable for liquid water.

    Elisa Quintana, an astronomer at the NASA Ames Research Center in Moffett Field, Calif., and colleagues...

    04/17/2014 - 14:00 Exoplanets, Astronomy
  • News

    Possible measles drug tests well in animals

    There’s no treatment for measles, but an experimental compound might do the trick by bogging down a key viral enzyme, a study of ferrets finds. When given to animals infected by a virus similar to the one that causes measles, the compound prevented illness.

    “This is still a ways away from human testing,” says Alan Hinman, a public health physician at the Task Force for Global Health, a...

    04/16/2014 - 14:00 Biomedicine, Health
  • News

    Triclosan aids nasal invasions by staph

    Sneezing out antimicrobial snot may sound like a superpower, but it actually could be a handicap.

    Triclosan, an omnipresent antimicrobial compound found in products ranging from soaps and toothpaste to medical equipment, is already known to show up in people’s urine, serum and breast milk. It seeps in through ingestion or skin exposure. Now, researchers have found that it gets into snot...

    04/15/2014 - 14:46 Health, Microbes, Toxicology