Uncategorized

  1. Health & Medicine

    Abortion-cancer link is rejected

    A workshop report concludes that abortions do not increase a woman's chance of developing breast cancer.

    By John Travis
  2. Math

    Scrambled Grids

    Amazingly simple mathematical operations can lead to intriguingly complex results. Consider, for instance, the iterative geometric process of creating flaky pastry dough. Flatten and stretch the dough, then fold it over on top of itself. Do it again and again and again. Repeating the pair of operations–stretch and fold–just 10 times produces 1,024 layers; 20 […]

    By Ivars Peterson
  3. Humans

    From the August 23, 1930, issue

    alt=”Click to view larger image”> STRICTLY AMERICAN Indian architects and sculptors of the American tropics in prehistoric times had strikingly original ideas.