GUEST COLUMN 2

TechLizard's

Volume1 #6





Truncated Top Five of Ten
from David Letterman
            
                From the Top Ten List for June 24, 1998 

                Top Five of Ten Signs Your Amish Teen Is In
                                   Trouble

  9.
   In his sock drawer, you find pictures of women
                      without bonnets. 
   8.
    Shows up at barn raisings in full "Kiss" makeup. 

   4.
    You come upon his secret stash of colorful socks. 

   2.
    Was recently pulled over for "driving under the
    influence of cottage cheese." 
   1.
    He's wearing his big black hat backwards.

GLOW-IN-THE-DARK SHARK

   An article in an August 1998 issue of Science News
describes a glow-in-the-dark shark which uses its 
glowing ability to help attract fish. 

The trick:  The little shark uses its glow to blend 
in with light filtering from the sky so that when 
viewed from below, it is hard to see as it hangs out 
toward the surface.  
     In addition it has a dark non-glowing spot near 
its chin which looks a bit like a small fish.  This
attracts other fish so that when the predator come
up to eat the "fish", the shark then bites the 
predator.  
     The luminescece has been known for more 
than a hundred years, but its strategy was recently
suggested by Edith A. Widder. 

The shark: the shark is small, (30 to 45 centimeter)
small-finned, flabby, and slow.  It has a 
cookie-cutter lower jaw which takes out cookie-shaped 
plugs of flesh out of bigger animals.  Probably, the
trick works well enough so that the shark doesn't 
need to be big, athletic or fast. 


The article quotes Margo G. Haywood: "The oceans glow
with novel strategies of bioluminescence."  The shark 
strategy is a "new twist," she notes.
 
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