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HOT OR COLD
CHIMNEYS demonstrates how the hands adapt to extreme temperatures,
sometimes with strange results. After putting each hand on the outside
columns for a count of fifteen, visitors put both hands on the center
column, and observe the same object feels differently to different
hands. The middle chimney is at room temperature, but it feels cool
to the hand that has been on the hot chimney and warm to the hand
that was on the cold chimney. Beneath the skin are temperature sensing
nerves. These nerves can tell whether an object is warmer or cooler
than body temperature, but they quickly adapt and the object starts
to feel "normal", neither warm nor cold
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