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Originally posted by jkrog08
It also makes no sense to assume that because aliens have scales they are dumb,humans have no more need for fingernails or hair,but we still have it from a left over evolutionary development,like the gull bladder and appendix.
It does make sense to assume(contrary to some beliefs)that ET life would take the same well working,bipedal format it took on Earth,it is the most logical and easiest way for species to become advanced and propagate past there origional environment(thus keeping with the point of evolution-to survive).
Let’s start with a bit of a shocker: our emotions are for more than 90% determined by biology and are mostly not malleable. This means that anybody who gets angry easily or who is rather sensitive will remain so for his or her entire life. But there’s good news: people with a healthy brain can change the way they respond to their emotions. Undesirable reactions can be unlearned, and more desirable reactions can be learned.
Our emotions are regulated by what is called the lizard brain: a very primitive part that is tiny compared to other parts of our brain, that is located at the center of our brain and that we inherit from our animal ancestors.
In which case my point still stands, because reptilian and grey faces are not nearly as complicated as ours, eliminating the need for the large brain.
The amygdalae (Latin, also corpus amygdaloideum, singular amygdala, from Greek αμυγδαλή, amygdalē, 'almond', 'tonsil', listed in the Gray's Anatomy as the nucleus amygdalæ) are almond-shaped groups of nuclei located deep within the medial temporal lobes of the brain in complex vertebrates, including humans. Shown in research to perform a primary role in the processing and memory of emotional reactions, the amygdalae are considered part of the limbic system.
Some lizards, such as the chameleon, can change colors to blend into their environment. This camouflage helps to protect them from predators.
The scales of reptiles are more diagnostic then they might first appear. Though they come in a variety of colors, shapes and sizes, they originate the same way in all living reptiles. Scales form by a folding of the epidermis during embryonic development. The result is skin with a scaley extension. Thus scales are a form of integument. Skin can be seen between the scales in certain species, while it is readily visible in snakes that are swallowing something large.
So why is this important? Don't fish also have scales?
The answer, of course, is yes. Fish do have scales. In fact, certain amphibian species are also known to possess scales (caecilians and prehistoric taxa), but the scales of fish and amphibians are dermal in origin. If one were to descale a reptile one would wind up with a bloody, but still skin covered animal.
Also, if they had complex social networks it stands to reason that they have morals, otherwise they would have exterminated themselves eons ago. In which case if they have morals, by the time they got to space they would understand that interacting with other species is a big noo-noo because what if you are interpreted as gods and do something by accident that the primitive race sees as violent and is seen as a sign that violence is good?
In which case we would never see them, because they would know not to get involved at the risk of creating a galactic Frankenstein.