Im only 16 so heres MY THEORY BTW ITS JUST A THOUGHT!!!
Assume you are dreaming right now. No. Assume you are Lucid Dreaming. Are we awake or asleep? What if our 3d dimensional everyday living life is just all a lucid dream. And another Earth is galaxies from us. One is Sleeping, One is awake. How could we be awake and lucid dreaming at the same time? Easy. If there is another earth exactly like ours in everysingle way even all the people, we could be sleeping and awake because if were lightyears away time is slower, according to Einstien in Theory of Relativity. This theory has holes but im just 16 give me a break ahha. So. We could just be lucid dreaming and each day is 365 times slower in our lucid dream then when we wake up when were about 100. Or what if were all dead all ready? i mean the bible(im no bible hugger I dont consider myself into major religion but, im just thinking.) You know how in the bible it says when we go to heaven we get new bodies and everything? and eternal life?
Lucid Dreaming+Reincarnation+DeepSleep=that it makes sence! at least to me.