Uncategorized

  1. Ecosystems

    Empty Nets

    New research has begun challenging long-held assumptions about the consequences for fish stocks of harvesting the biggest fish first.

    By Janet Raloff
  2. Math

    Mean Median Surprise

    Calculations of means and medians lead to surprising sequences of numbers.

    By Ivars Peterson
  3. Humans

    Letters from the May 28, 2005, issue of Science News

    Hunger pangs I was interested to read about factors influencing the “hunger hormone’s”—ghrelin’s—effectiveness (“Still Hungry?” SN: 4/2/05, p. 216). One factor not considered but seemingly very significant is physical activity. I suggest that it is more useful to understand and encourage the positive effects of physical activity on overall well-being than to develop new drugs […]

    By Science News
  4. Humans

    From the May 25, 1935, issue

    A yacht's air resistance-reducing mast, plants that absorb poison, and new fossils from Patagonia.