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How Sensitive Are You?

If your senses are working normally, you can:

  • Feel on your fingertips or face a pressure that depresses your skin a bare .00004 inch.
  • See a small candle flame from 30 miles away on a clear, dark night.
  • Smell one drop of perfume diffused through a three-room apartment.
  • Taste .04 ounce of table salt dissolved in 530 quarts of water.
  • Feel the weight of a bee’s wing falling on your cheek from less than half an inch away.
  • Distinguish among more than 300,000 different color variations.
  • Gauge the direction of a sound’s origin based on a .00003-second difference in its arrival from one ear to the other.

John D. McGervey and Bill Sones in Buffalo (N.Y.) News Magazine, quoted in Readers Digest, May 1996, p. 91.