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  • chromosomes
Your search has returned 64 articles:
  • Say What?

    Chromothripsis

    The catastrophic shattering of a chromosome, which can spark cancer development. All or part of a chromosome may break into pieces, some of which reassemble. Leftover fragments can form DNA circles (colored dots, above) that replicate wildly. If the circles contain cancer-causing genes, their proliferation fuels tumor growth. Disintegrating chromosomes may be the cause of many childhood cases...

    06/29/2013 - 00:00 Genetics
  • News

    DSM-5 enters the diagnostic fray

    To a cacophony of boos, so-whats and even a few cheers, the American Psychiatric Association released the fifth edition of its Diagnostic and Statistical Manual of Mental Disorders, DSM-5, on May 18 at its annual meeting in San Francisco.

    Controversy always flares when psychiatrists redefine which forms of human suffering will count as real and reimbursable by medical...

    06/14/2013 - 10:44 Mental Health
  • Letters to the Editor

    Letters to the editor

    Invertebrate enigmas I found the recent article “Evolutionary enigmas” (SN: 5/18/13, p. 20) fascinating because I know of another example of an invertebrate animal possessing a “strictly vertebrate” quality. As a high school human anatomy and physiology teacher, I sometimes have my students test the effects of the constituents in cigarette smoke on live Daphnia heart rates. These arthropods...

    06/13/2013 - 15:51
  • Balloon Clears Arteries

    A tiny balloon inserted into dangerously clogged arteries at the tip end of a long tube is saving lives by sweeping away the blood clots. A 29-year-old resident in surgery invented the device…. It has been used on 22 patients at the Good Samaritan Hospital in Cincinnati. Dr. Thomas J. Fogarty, now at the University of Oregon Medical School, originated the new … balloon-catheter...

    06/13/2013 - 15:46 Biomedicine
  • People

    Tim Samaras, 1957–2013

    As a child, Tim Samaras frustrated his parents by sneaking kitchen appliances into his bedroom to dismantle them. One day his mother had to coax him to come watch a movie musical with her. It was The Wizard of Oz, and the 9-year-old sat transfixed throughout the tornado scene. As he recalled last year, his only thought was: “I’ve got to take that apart!” For much of the last two decades, the...

    06/13/2013 - 15:34 Science & Society