well that's been debated/shot down in my world from my fam who have been nasa entrenced! Being a free thinker I've entertained many different theories and possibilities! To point, I have even stated if any of these are possible, I have to go right back to that question you state, how would it change our world to know it is indeed different than what has been fed to us and why? All I know I am not going to get the answers from the so called people in the know as it is obviously the unknown and shall be kept that way until it is revealed to us! All I really know is it definately keeps me intrigued and open to receive the answers🙃