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E.g., 08/19/2018
E.g., 08/19/2018
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Your search has returned 1852 articles:
  • Mystery Solved

    How salamanders can regrow nearly complete tails but lizards can’t

    Salamanders and lizards can both regrow their tails, but not to equal perfection.

    While a regenerated salamander tail closely mimics the original, bone and all, a lizard’s replacement is filled with cartilage and lacks nerve cells. That contrast is due to differences between stem cells in the animals’ spinal cords, researchers report online August 13 in Proceedings of the National...

    08/17/2018 - 12:30 Cells, Development, Animals, Evolution
  • News

    A resurrected gene may protect elephants from cancer

    Elephants rarely succumb to cancer. That’s surprising given how large the animals grow and how long they can live, which should provide more opportunities for cells to morph into cancer cells. A newly described gene that was brought back from the dead may take part in protecting the animals from the disease.

    A deep dive into elephants’ evolutionary history revealed a defunct gene called...

    08/14/2018 - 14:23 Health, Genetics, Animals
  • News

    Tiny bits of RNA can trigger pain and itchiness

    Some snippets of RNA can be a real pain.

    A microRNA called miR-30c-5p contributes to nerve pain in rats and people, a new study finds. A different microRNA, miR-711, interacts with a well-known itch-inducing protein to cause itching, a second study concludes. Together, the research highlights the important role that the small pieces of genetic material can play in nerve cell function,...

    08/13/2018 - 14:06 Cells, Physiology, Neuroscience, Genetics
  • News

    The first gene-silencing drug wins FDA approval

    A Nobel Prize–winning discovery — that small double-stranded RNA molecules can silence genes by interrupting the translation of DNA’s instructions into proteins — is finally delivering on its medical promise.

    The first drug that takes advantage of this natural biological process, called RNA interference, was approved August 10 by the U.S. Food and Drug Administration. It targets a rare...

    08/10/2018 - 15:52 Biomedicine, Clinical Trials, Health, Genetics
  • News in Brief

    Here’s how fast cell death can strike

    Scientists now know how long it takes for a cell to tell itself it’s time to die.

    Signals triggering a type of cell suicide called apoptosis move through a cell like a wave, traveling at a rate of 30 micrometers per minute, Stanford University systems biologists Xianrui Cheng and James Ferrell Jr. report in the Aug. 10 Science.

    These findings resolve a debate over whether these...

    08/09/2018 - 15:17 Cells, Development
  • News

    A ghost gene leaves ocean mammals vulnerable to some pesticides

    A gene that helps mammals break down certain toxic chemicals appears to be faulty in marine mammals — potentially leaving manatees, dolphins and other warm-blooded water dwellers more sensitive to dangerous pesticides.

    The gene, PON1, carries instructions for making a protein that interacts with fatty acids ingested with food. But that protein has taken on another role in recent decades...

    08/09/2018 - 14:00 Animals, Molecular Evolution, Toxicology
  • News

    A newly approved drug could be a boon for treating malaria

    The first new treatment in 60 years for a particularly stubborn kind of malaria is raising hopes that it might help eradicate the disease, even though the treatment can cause a dangerous side effect.

    Called tafenoquine, the drug targets the parasite that causes relapsing malaria. Plasmodium vivax infects an estimated 8.5 million people, mainly in Asia and Latin America. Each time...

    08/09/2018 - 10:00 Health, Microbes, Genetics
  • Letters to the Editor

    Readers question dark fusion, Antarctic ice melting and more

    Melt away

    In the last five years, Antarctica has lost ice nearly three times faster on average than it did over the previous 20 years — largely due to climate change, Laurel Hamers reported in “Antarctica has lost about 3 trillion metric tons of ice since 1992” (SN: 7/7/18, p. 6).

    “Isn’t there a volcano or multiple volcanoes recently found under Antarctica that might also be...

    08/09/2018 - 07:00 Climate, Particle Physics, Microbiology
  • News

    Researchers say CRISPR edits to a human embryo worked. But critics still doubt it

    When researchers announced last year that they had edited human embryos to repair a damaged gene that can lead to heart failure, critics called the report into question.

    Now new evidence confirms that the gene editing was successful, reproductive and developmental biologist Shoukhrat Mitalipov and colleagues report August 8 in Nature. “All of our conclusions were basically right,”...

    08/08/2018 - 14:45 Genetics, Science & Society
  • News

    The debate over people’s pathway into the Americas heats up

    Despite recently getting a cold shoulder from some researchers, a long-standing idea that North America’s first settlers entered the continent via an ice-free inland corridor boasts more scientific support than any other proposal, an international team says.

    New World colonizers from Asia may also have traveled by canoe down the Northwest Pacific Coast and perhaps much farther, as...

    08/08/2018 - 14:00 Archaeology, Anthropology, Genetics