leaves. In a building con-
structed by human beings,
the elements that hold the
building up (studs and
beams) and the water sys-
tem are built separately. It
is a case of marvelous de-
sign that, in the case of
plants, these two things
happen at one and the
same time."
Kareem
was
thinking: "This is
really a wonder-
ful system. I
wonder … it's as if
there was a calen-
dar or a clock hid-
den inside a plant
that lets it do the
same things all the
time without getting
confused. For ex-
ample, every spring
the flowers bloom
and every fall the
leaves drop off
the trees. How
does that hap-
pen, Grandpa?"
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