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E.g., 03/26/2019
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  • News in Brief

    Epileptic seizures may scramble memories during sleep

    SAN FRANCISCO — Seizures during sleep can scramble memories — a preliminary finding that may help explain why people with epilepsy sometimes have trouble remembering.

    The sleeping brain normally rehashes newly learned material, a nocturnal rehearsal that strengthens those memories. Neuroscientist Jessica Creery and her colleagues forced this rehearsal by playing certain sounds while nine...

    03/26/2019 - 13:47 Health, Neuroscience
  • News

    Sperm with damaged DNA may cause some repeat miscarriages

    NEW ORLEANS — For couples who have suffered repeated miscarriages, it may be useful to scrutinize the man’s reproductive health as closely as the woman’s. Some miscarriages may be linked to abnormalities in semen, a study finds.  

    Researchers analyzed semen from 49 men whose partners had lost three or more consecutive pregnancies before the 20-week mark. The men had sperm with more than...

    03/26/2019 - 10:43 Health
  • News

    A single sweaty workout may boost some people’s memory

    SAN FRANCISCO — For some older people, the brain boosts from exercise can be almost immediate. Improvements in their thinking abilities after a single 20-minute bout of pedaling a stationary bike mirrored those produced by three months of regular exercise, according to a preliminary study presented March 24 at the annual meeting of the Cognitive Neuroscience Society. 

    In addition to...

    03/26/2019 - 06:00 Health, Neuroscience
  • News

    Edibles are tied to more severe health issues than smoking marijuana

    After Colorado voted to legalize marijuana in 2012, doctors in Denver noticed a surprising trend. Most people who visited the emergency room for cannabis-related complaints had smoked the drug. But those who ingested the drug were more likely to suffer more severe effects, including psychiatric symptoms and heart problems.

    Edibles — marijuana-laced products such as brownies, cookies and...

    03/25/2019 - 17:25 Health
  • News

    Signs of new nerve cells spotted in adult brains

    A tweaked laboratory protocol has revealed signs of thousands of newborn nerve cells in the brains of adults, including an octogenarian. 

    These immature neurons, described online March 25 in Nature Medicine, mark the latest data points in the decades-old debate over whether people’s brains churn out new nerve cells into adulthood. The process, called neurogenesis, happens in the brains...

    03/25/2019 - 12:00 Health, Neuroscience
  • News in Brief

    How a proton gets its spin is surprisingly complicated

    Like a quantum version of a whirling top, protons have angular momentum, known as spin. But the source of the subatomic particles’ spin has confounded physicists. Now scientists have confirmed that some of that spin comes from a frothing sea of particles known as quarks and their antimatter partners, antiquarks, found inside the proton. 

    Surprisingly, a less common type of antiquark...

    03/25/2019 - 07:00 Particle Physics, Quantum Physics
  • Feature

    Saber-toothed cats were fierce and family-oriented

    The adolescent saber-toothed cat on a summertime hunt realized too late that she had made a terrible miscalculation. 

    Already the size of a modern-day tiger, with huge canine teeth, she had crept across grassy terrain to ambush a giant ground sloth bellowing in distress. Ready to pounce, the cat’s front paw sank into sticky ground. Pressing down with her other three paws to free herself...

    03/24/2019 - 06:00 Paleontology, Animals, Evolution
  • News

    Women have a new weapon against postpartum depression, but it’s costly

    Approval of the first and only treatment in the United States specifically targeting postpartum depression offers hope for millions of women each year who suffer from the debilitating mental health disorder after giving birth.

    The new drug brexanolone — marketed under the name Zulresso and approved on March 19 by the U.S. Food and Drug Administration — is expected to become available to...

    03/22/2019 - 14:32 Neuroscience, Mental Health
  • Science Visualized

    U.S. fentanyl deaths are rising fastest among African-Americans

    Since people in the United States began dying in the fentanyl-related drug overdose epidemic, whites have been hit the hardest. But new data released March 21 by the Centers for Disease Control and Prevention show that African-Americans and Hispanics are catching up.

    Non-Hispanic whites still experience the majority of deaths involving fentanyl, a synthetic opioid. But among African-...

    03/22/2019 - 13:17 Health
  • The –est

    The oldest known astrolabe was used on one of Vasco da Gama’s ships

    While searching for shipwreck remains near Oman in the Arabian Sea in 2014, divers discovered an unusual metal disk that has since proven to be the world’s oldest known mariner’s astrolabe, British researchers report.

    The navigational device came from the wreckage of a ship in the Portuguese armada that had been part of explorer Vasco da Gama’s second voyage to India from 1502 to 1503....

    03/22/2019 - 06:00 Archaeology