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Template:POTD/2012-07-25
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2012 July
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Picture of the day
On
July 25
, 1976, the
Viking 1
spacecraft captured images of a
mesa
in the
Cydonia
region of
Mars
with the appearance of a humanoid face (see inset), which led to much speculation about
life on Mars
. In 2007, high-resolution images taken by the
Mars Reconnaissance Orbiter
of the same structure definitively showed that the face was merely an
optical illusion
known as
pareidolia
.
Photo:
NASA
/
JPL
/
University of Arizona
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