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  • Parkes Radio Telescope
Your search has returned 32 articles:
  • News in Brief

    Diamonds under pressure impersonate exoplanet cores

    Researchers have squeezed diamonds to a record-setting pressure — 14 times as high as that inside Earth’s core. The compressed diamond’s properties could reveal the extreme conditions deep inside supersized distant planets, the team reports in the July 17 Nature.

    To constrict diamond, the least compressible known material, physicist Ray Smith of Lawrence Livermore National Laboratory in...

    07/16/2014 - 13:00 Condensed Matter, Exoplanets, Physics
  • News

    Electrode turns consciousness on and off

    With a zap from a single brain electrode, doctors were able to wipe out a woman’s consciousness. As soon as the electrode turned on, the woman remained awake but became blank and withdrew from awareness. When the electrode turned off, she returned to normal, though she remembered nothing of the experience.

    The results provide a tantalizing hint to a question that has plagued thinkers for...

    07/15/2014 - 16:22 Neuroscience, Health
  • News

    Clovis people may have hunted elephant-like prey, not just mammoths

    Ancient North America’s Clovis people, known as mammoth and mastodon hunters of the Great Plains, may have started out as gomphothere hunters of northwestern Mexico.

    New finds indicate for the first time that Clovis people killed these now-extinct elephant-like creatures. What’s more, Clovis people did so from the culture’s early days in a region well south of the best-known Clovis sites...

    07/14/2014 - 15:00 Anthropology, Archaeology
  • News in Brief

    Heavy marijuana use may affect dopamine response

    People who use marijuana heavily appear to have blunted brain responses to dopamine, a chemical messenger associated with pleasant feelings, motivation and reward. This diminished response might help explain why some people abuse cannabis, scientists write July 14 in the Proceedings of the National Academy of Sciences. 

    Nora Volkow, director of the National Institute on Drug Abuse in...

    07/14/2014 - 15:00 Neuroscience, Health
  • News

    HIV reemerges in ‘cured’ child

    HIV has resurfaced in a child who was presumed cured of the virus. The discovery spotlights limits in detecting the clandestine germ and raises questions about whether HIV can ever truly be cured, experts say.

    The child was born HIV-positive in 2010 and received treatment with standard antiretroviral drugs. The patient’s therapy was unexpectedly interrupted 18...

    07/14/2014 - 10:45 Health, Immune Science
  • News

    Saharan dust explains Bahamas’ paradoxical existence

    The Bahamas owes its origins to windswept dust from Africa’s Sahara Desert, scientists propose June 30 in Geology.

    The dust nourishes microbes that produce calcium carbonate, the core building block of the Bahama Islands, the researchers say. Over the last 100 million years this carbonate has assembled into the Great Bahama Bank, a 4.5-kilometer-thick platform. This underwater shelf the...

    07/11/2014 - 15:23 Oceans, Earth
  • News

    Lab version of early universe fails to solve lithium problem

    An underground experiment has imitated conditions from just after the Big Bang to produce the universe’s most confounding element, lithium. The experiment’s result reinforces what scientists call the lithium problem, a discrepancy between the amounts of the element thought to have been produced 13.8 billion years ago and the amounts observed in ancient stars. This discrepancy challenges...

    07/11/2014 - 12:25 Cosmology, Particle Physics
  • News

    Decline in birds linked to common insecticide

    Insects may not be the only collateral damage from a controversial group of insecticides.

    The class of chemicals, called neonicotinoids, is used in agricultural fields worldwide to reduce crop-eating pests. Since neonicotinoids were introduced in the 1990s, researchers have reported unintended harm to bees and other pollinators (SN Online: 4/5/12). But a new study suggests that the...

    07/11/2014 - 08:00 Pollution, Toxicology, Ecosystems
  • News in Brief

    Two genes clear up psoriasis and eczema confusion

    A test might prevent hundreds of thousands of misdiagnosed cases of skin disease by simply checking two genes, scientists report in the July 9 Science Translational Medicine.

    Eczema and psoriasis are widespread, affecting 10 percent and 3 percent of the population, respectively. Both skin diseases produce itchy red patches that can look similar, even under the microscope. Accurate...

    07/09/2014 - 17:56 Biomedicine, Health, Genetics
  • News

    Gecko adhesion takes electric turn

    Clinging upside down to polished surfaces is simple for geckos, but scientists’ grasp of the underlying forces behind this phenomenal adherence just became murkier. Researchers report that the adhesiveness of gecko feet is aided by static electricity, contrary to long-held beliefs.

    The misconception over gecko adhesion dates back to 1934, says Yale University chemical engineer and study...

    07/09/2014 - 15:45 Biophysics, Animals