Carl%20Sagan%20-%20The%20Demon%20Haunted%20World

The Man in the Moon and the Face on Mars
Occasionally, a vegetable or a pattern of wood grain or the hide
of a cow resembles a human face. There was a celebrated eggplant
that closely resembled Richard M. Nixon. What shall we deduce
from this fact? Divine or extraterrestrial intervention? Republican
meddling in eggplant genetics? No. We recognize that there are
large numbers of eggplants in the world and that, given enough of
them, sooner or later we'll come upon one that looks like a human
face, even a very particular human face.
When the face is of a religious personage - as, for example, a
tortilla purported to exhibit the face of Jesus - believers tend
quickly to deduce the hand of God. In an age more sceptical than
most, they crave reassurance. Still, it seems unlikely that a miracle
is being worked on so evanescent a medium. Considering how
many tortillas have been pounded out since the beginning of the
world, it would be surprising if a few didn't have at least vaguely
familiar features.*
Magical properties have been ascribed to ginseng and mandrake
roots, in part because of vague resemblances to the
human form. Some chestnut shoots show smiling faces. Some
corals look like hands. The ear fungus (also unpleasantly called
'Jew's ear') indeed looks like an ear, and something rather like
enormous eyes can be seen on the wings of certain moths. Some
of this may not be mere coincidence; plants and animals that
suggest a face may be less likely to be gobbled up by creatures
with faces - or creatures who are afraid of predators with faces.
A 'walking stick' is an insect spectacularly well disguised as a
twig. Naturally, it tends to live on and around trees. Its mimicry
of the plant world saves it from birds and other predators, and
is almost certainly the reason that its extraordinary form was
slowly moulded by Darwinian natural selection. Such crossings
of the boundaries between kingdoms of life are unnerving. A
* These cases are very different from that of the so-called Shroud of Turin, which
shows something too close to a human form to be a misapprehended natural
pattern and which is now suggested by carbon-14 dating to be not the death
shroud of Jesus, but a pious hoax from the fourteenth century - a time when
the manufacture of fraudulent religious relics was a thriving and profitable
home handicraft industry.
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