Uncategorized

  1. Animals

    Flowers, not flirting, make sexes differ

    Thanks to lucky circumstances, bird researchers find rare evidence that food, not sex appeal, makes some male and female hummingbirds look different.

    By Susan Milius
  2. Physics

    Device Sees More inside Live Cells

    A new type of optical microscope, which can discern objects smaller than a supposedly fundamental limit for visible-light viewing, may make it possible to see finer details of the insides of living cells.

    By Peter Weiss
  3. Humans

    From the March 4, 1933, issue

    FISH OF DIFFERENT “FEATHER” OFTEN FLOCK TOGETHER Game herds of the African veldt have long been a marvel to travelers because of the extraordinary variety of animals seen together: zebras, gnus, antelope of many species, even elephants and ostriches, mingling in a wonderful patchwork quilt of moving life.