Reptillians, Bible, Religion

The theory goes, that when God, (or whoever) was making we animals, he began with his first creation, the 'reptile brain' which is that brain that all reptiles have. It is a survival brain, totally relying upon instinct and programming, no thought, only reflex reactions caused by its particular 'computer' programming. A snake does not 'think', it does not love, hate or feel resentment etc., it just lives and survives. This is the kind of brain that the snake has. We too have this brain! But it is only 5% of our total brain size.

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Does the bible or religion know about this when they wrote stories of creation days how man got tricked?
Does it mean that ancient people knew about these traits?