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E.g., 09/25/2017
E.g., 09/25/2017
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  • News

    Neandertal kids were a lot like kids today — at least in how they grew

    A Neandertal child whose partial skeleton dates to around 49,000 years ago grew at the same pace as children do today, with a couple of exceptions. Growth of the child’s spine and brain lagged, a new study finds.

    It’s unclear, though, whether developmental slowing in those parts of the body applied only to Neandertals or to Stone Age Homo sapiens as well. If so, environmental conditions...

    09/25/2017 - 09:00 Anthropology, Human Evolution
  • News

    From day one, a frog’s developing brain is calling the shots

    Frog brains get busy long before they’re fully formed. Just a day after fertilization, embryonic brains begin sending signals to far-off places in the body, helping oversee the layout of complex patterns of muscles and nerve fibers. And when the brain is missing, bodily chaos ensues, researchers report online September 25 in Nature Communications.

    The results, from brainless embryos and...

    09/25/2017 - 05:00 Biomedicine, Animals, Neuroscience
  • Growth Curve

    Telling children they’re smart could tempt them to cheat

    It’s hard not to compliment kids on certain things. When my little girls fancy themselves up in tutus, which is every single time we leave the house, people tell them how pretty they are. I know these folks’ intentions are good, but an abundance of compliments on clothes and looks sends messages I’d rather my girls didn’t absorb at ages 2 and 4. Or ever, for that matter.

    Our words, often...

    09/22/2017 - 14:54 Child Development, Parenting
  • News

    The way poison frogs keep from poisoning themselves is complicated

    View the video

    For some poison dart frogs, gaining resistance to one of their own toxins came with a price.

    The genetic change that gives one group of frogs immunity to a particularly lethal toxin also disrupts a key chemical messenger in the brain. But the frogs have managed to sidestep the potentially damaging side effect through other genetic tweaks, researchers report in the...

    09/22/2017 - 11:56 Toxicology, Evolution, Animals
  • News

    Gene variant linked to Alzheimer’s disease is a triple threat

    A genetic risk factor for Alzheimer’s disease is a double, make that triple, whammy.

    In addition to speeding up the development of brain plaques associated with Alzheimer’s, a gene variant known as APOE4 also makes tau tangles — another signature of the disease — worse, researchers report online September 20 in Nature. APOE4 protein also ramps up brain inflammation that kills brain cells...

    09/22/2017 - 09:00 Neuroscience, Genetics, Cells
  • Confusion lingers over health-related pros and cons of marijuana

    Confusion over effects

    No one knows whether chronic marijuana smoking causes emotional troubles or is a symptom of them.... This dearth of evidence has a number of explanations: serious lingering reactions, if they exist, occur after prolonged use, rarely after a single dose; marijuana has no known medical use, unlike LSD, so scientists have had little reason to study the drug…. Also,...

    09/22/2017 - 07:00 Psychology, Science & Society
  • Science Ticker

    Plate tectonics started at least 3.5 billion years ago

    Plate tectonics may have gotten a pretty early start in Earth’s history. Most estimates put the onset of when the large plates that make up the planet’s outer crust began shifting at around 3 billion years ago. But a new study in the Sept. 22 Science that analyzes titanium in continental rocks asserts that plate tectonics began 500 million years earlier. 

    Nicolas Greber, now at the...

    09/21/2017 - 15:12 Earth
  • News

    Ultrahigh energy cosmic rays come from outside the Milky Way

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    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

    Shhhh! Some plant-eating dinos snacked on crunchy critters

    Some dinosaurs liked to cheat on their vegetarian diet.

    Based on the shape of their teeth and jaws, large plant-eating dinosaurs are generally thought to have been exclusively herbivorous. But for one group of dinosaurs, roughly 75-million-year-old poop tells another story. Their fossilized droppings, or coprolites, contained tiny fragments of mollusk and other crustacean shells along...

    09/21/2017 - 09:00 Paleontology, Animals
  • News

    Intense storms provide the first test of powerful new hurricane forecast tools

    This year’s Atlantic hurricane season has already proven to be active and deadly. Powerful hurricanes such as Harvey, Irma and Maria are also providing a testing ground for new tools that scientists hope will save lives by improving forecasts in various ways, from narrowing a storm’s future path to capturing swift changes in the intensity of storm winds.

    Some of the tools that debuted...

    09/21/2017 - 08:07 Earth, Climate