THE SPECIAL COOLING SYSTEM
OF GAZELLES
Air conditioners protect us from cold in winter and from heat in summer.
Yet humans are not the first beings to discover cooling systems. Many crea-
tures already have in their bodies cooling systems that function like air con-
ditioners.
We may give the fast running gazelles of Africa as an
example. Like many others, this animal, too, has to
run away from its enemies to survive because it
does not have any other defense mechanism. Yet
this fast running increases its body
heat excessively, which is very dan-
gerous for the gazelle because as
the body heat increases, so does
the gazelle’s brain
heat. However, in
order for the
gazelle to sur-
vive, its brain
heat needs to
be cooler than
that of the
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