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  • sperm
  • phages
  • steel bridge
Your search has returned 56 articles:
  • 50 years ago, contraception options focused on women

    Next in birth control

    The pill is a sledgehammer approach to contraception.... A second-generation of [drugs] is being designed to do the job without upsetting a woman’s normal cycle of ovulation and menstruation.... A contraceptive administered to the man can be given only for a short time without actually affecting the development of sperm … and, therefore, is not being considered...

    04/06/2017 - 07:00 Health, Biomedicine, Science & Society
  • Editor's Note

    If there are curious young minds, science will survive

    One evening last month at the National Building Museum in Washington, D.C., 40 high school seniors dressed in formal wear and nibbling hors d’oeuvres showed off their scientific research to a crowd of more than 500 people. Positioned at their posters, the students enthusiastically described their efforts to improve quadcopter flight control, study implicit bias and gender stereotypes...
    04/05/2017 - 10:40 Science & Society
  • Letters to the Editor

    Readers question mental health research

    New normal

    People who stay mentally healthy throughout life are exceptions to the rule, a small study suggests. Only 17 percent of study participants experienced no bouts of anxiety, depression or other mental ailments from late childhood to middle age, Bruce Bower reported in “Lasting mental health may be unusual” (SN: 3/4/17, p. 7).

    Reader Lou Floyd found the article disturbing and...

    04/05/2017 - 10:39 Mental Health, Animals, Physics
  • Feature

    CRISPR had a life before it became a gene-editing tool

    It is the dazzling star of the biotech world: a powerful new tool that can deftly and precisely alter the structure of DNA. It promises cures for diseases, sturdier crops, malaria-resistant mosquitoes and more. Frenzy over the technique — known as CRISPR/Cas9 — is in full swing. Every week, new CRISPR findings are unfurled in scientific journals. In the courts, universities fight over patents...

    04/05/2017 - 09:00 Cells, Microbiology, Molecular Evolution
  • Teaser

    Bone-inspired steel cracks less under pressure

    The heavy-duty material used to build bridges and sculpt skyscrapers could learn a few tricks from humble bones.

    Steel’s weakness is its tendency to develop microscopic cracks that eventually make the material fracture. Repeated cycles of stress — daily rush hour traffic passing over a bridge, for example — nurture these cracks, which often aren’t apparent until the steel collapses....

    04/04/2017 - 10:00 Materials