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- <text id=92TT1102>
- <title>
- May 18, 1992: Magnets on the Brain
- </title>
- <history>
- TIME--The Weekly Newsmagazine--1992
- May 18, 1992 Roger Keith Coleman:Due to Die
- </history>
- <article>
- <source>Time Magazine</source>
- <hdr>
- THE WEEK, Page 25
- HEALTH & SCIENCE
- Magnets on the Brain
- </hdr><body>
- <p>Why some humans have a better sense of direction
- </p>
- <p> Scientists have known for years that some animals -- birds,
- fish, insects -- have tiny natural magnets embedded in their
- tissues, crystals of a mineral known as magnetite. The
- suspicion is that magnetite enables these creatures to sense the
- earth's magnetic field, letting them navigate from one place to
- another with what amounts to biological compasses.
- </p>
- <p> Now a group of scientists at the California Institute of
- Technology has discovered that magnetite is found in human
- brains as well. That could eventually explain why some people
- have a better sense of direction -- perhaps they have more
- magnetite. The presence of magnetically sensitive crystals in
- the brain could conceivably explain the health problems some
- people claim are caused by electromagnetic fields. Until now,
- no one knew of anything in the body that could be affected by
- these fields. One caveat from a researcher: the magnetic fields
- from high-tension power lines, often cited as prime culprits,
- are not strong enough to affect the crystals his team found --
- though those from some home appliances, like electric blankets,
- may be. Even then, the link is only more plausible than it once
- was, but still a long way from proved.
- </p>
-
- </body></article>
- </text>
-
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