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