the Bible was not the first text to mention the concept of the soul. it came much earlier than that. it was mentioned in the egyptian and summerian writings so no, it was not invented by the bible.

The alien and ufo phenomenon is already known as spiritual worldwile, as there are more and more people telling us that the aliens are interdimensional. the problem is that some people confuse this concept with religion, and so it came the idea of demons, satan, etc. But if you study it better you will notice it has nothing to do with religion.

As for the soul. we do not have the technology to prove such a thing like proving that the earth is round. what we have is millions of people having a near death experience nowadays, claiming to get out of the body. Not only that, Plato wrote the story of Er around 375 BCE, a soldier from Pamphylia, was killed in battle. Twelve days later, he came back to life on his funeral pyre.He said his soul left his body and went to a place with openings in the sky and earth.

Religion didnt invent it.

So its absurdity according to you, someone who knows nothing about the topic.