| It was mentioned on a biology blog that
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| | for planets similar to Earth regarding
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| archaeological engravings from the
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| | temperature and chemical composition
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| Tiwanaku civilization in Bolivia are
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| | because they know life evolved here, so
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| unlikely to be depicting an ancient
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| | it is logical to assume that life might
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| astronaut for the reason that, even with
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| | also evolve on other similar planets.
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| an aquatic tail, the creature still looks
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| | Likewise, with similar planetary history,
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| too much like a human. The underlying
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| | we might expect the evolutionary process
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| argument was that the evolution of life
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| | on those other planets to progress
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| forms is so diverse that it is highly
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| | similarly to how it progressed here.
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| unlikely an alien would come out looking
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| | Question: Was the evolution of animal
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| even remotely like us. In essence, this
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| | life with two eyes on Earth a random
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| is the opposite side of the pendulum to
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| | event, so much so that we should expect
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| Hollywood's consistent imaging of aliens
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| | extraterrestrial life to have a different
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| as humanoids.
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| | number of eyes? I think not. Why? It is
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| The biologist ignored the decorative and
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| | called natural selection or survival of
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| symbolic imagery added by the Tiwanaku
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| | the fittest. Two eyes are the minimum
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| artists and did not consider the given
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| | required to give depth perception and
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| premise of an aquatic alien inside
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| | concentrated focus. Perhaps early on
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| helmeted spacesuit. I have to assume,
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| | Earth there were animals with five or ten
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| therefore, the biologist noted that the
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| | eyes, but with a brain too small to
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| creature had two arms and two eyes, and
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| | orientate five directions, such species
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| since humans have two arms and two eyes,
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| | quickly became extinct. Only two eyes
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| the biologist concluded that this cannot
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| | survived. Should we expect something
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| be an alien.
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| | radically different on another Earth-like
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| What should intelligent aliens look like?
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| | planet? No. It is reasonable to expect
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| Or, to phrase it another way, what should
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| | intelligent aliens to have two eyes, just
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| we expect interstellar travelers who come
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| | like humans.
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| here to look like? This is not a complete
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| | It is also reasonable to expect alien
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| unknown. If the aliens are capable of
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| | life forms to be imaginable from the
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| interstellar travel, they obviously
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| | diversity of life forms we see on Earth,
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| achieved higher technology. What is
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| | past and present. The Tiwanaku alien has
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| necessary to achieve technology? My
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| | features similar to a fish (fish mouth
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| opinion on this is that to achieve
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| | that seems to be breathing inside a
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| technology, a life form would need a
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| | water-filled helmet), features similar to
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| complex brain and the ability to see and
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| | a lobster (sea creature with two forward
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| manipulate objects. This implies eyes,
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| | appendages for manipulating objects), and
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| fingered appendages, and perhaps a head
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| | features similar to humans (large head
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| relatively large compared to overall body
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| | and fingered upper appendages). Only four
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| size. The Tiwanaku alien has all these
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| | fingers are depicted in the Tiwanaku
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| features.
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| | drawings, versus our five, but this
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| The biologist might counter that the
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| | easily falls within evolutionary
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| issue is not that aliens have eyes, but
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| | feasibility. The alien's three-pod
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| the number of eyes. Here on Earth, higher
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| | aquatic tail is also an imaginable
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| animal forms evolved with two eyes. For
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| | evolutionary development.
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| example, mammals, birds, fish, reptiles,
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| | I think the biologist's appreciation for
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| and insects all have two eyes, but on
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| | the potentially enormous diversity of
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| another planet the number of eyes would
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| | life forms in the universe is admirable.
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| be different. There, perhaps, the life
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| | For those life forms that develop higher
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| forms would randomly have one, three,
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| | technology, however, it is likely, not
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| four, or even ten eyes. Is that true? Is
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| | unlikely, that they will have something
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| the number of eyes a random event in the
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| | in common with humans.
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| evolutionary process?
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| | This article referred to Bella Online
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| Astronomers searching for
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| | Biology comments on the Tiwanaku Alien
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| extraterrestrial intelligence are looking
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| | pages of the website.
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