Ants and leeches
Name: Grace M Stephen
Can ants be trained to go through a maze?
How are leeches being used in modern medicine?
Ants lay down chemical trails (using a compound not dissimilar to formic
acid) between food sources and their nest. So if you set up a maze with
some food, ants will appear to learn the maze over time, but they are
actually just following chemical trails (which are strengthened by each
ant that follows the route). I'm not certain that you could train ants
to run mazes in the usual sense, but I wouldn't bet against it (I used to
Leeches are excellent at draining off excess fluid that may accumulate
around healing wounds. In particular on the extremities, this fluid can
build up and cause pressure that inhibits healing and the restoration of
normal blood circulation. Thus leeches can be and are being used following
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Update: June 2012