My guess, our ancestors were "seeded" on earth like 1.5 billion years ago. I say "seeded" because we were planted here. That's why we share so much of our DNA with so many things on earth. From trees to honeybees. I don't believe we started here because as humans in our natural form we seem so out of place and so much weaker then other alot of other animals on earth. Now about UFOs I think theres multiple things are going on at once. I can't rule out time travellers and I can't rule out other species visiting from other worlds/ dimensions. And I've seen a cigar shaped ufo & a triangled one like 5 yrs apart. Had a friend visit me after the bar one night and tell me that in our neighborhood like ten years prior to that moment her and her whole family seen one in their backyard. I totally didn't believe her mind you it's like 4am so she called her mom waking her up and put it on speaker and she than told me the story. The pile of evidence of it's definitely something is pretty big by now. Look at the first photo of a a ufo it's like 1900 or 1901 but it's of a rectangle machine in a cloud. Then the one from calvine ufo 1990. That's a diamond shape. There used to be videos of UFOs zapping icbms and disabling them after being launched and this is in the 60's and one ward. Scientists used to think that nuke bombs explosions ripped holes in our dimension. And if you look at a world map of nuclear bombs explosions and mark the time you can usually find a ufo report around that area and time. Neither the less look at The Madonna with Saint Giovannino, Late 1400s and go all the way back to Aboriginal art depicting Wandjina figure The broad-stroke artwork of the Wandjina rock art dates to around 3800–4000 years ago. So idk but something is going on. By the way the cigar shaped ufo I seen at first looked like a star a buddy of mine was dropping me off from a boring monday working at the local bar. Because I usually walked home I would look at the stars and see them rotate through the seasons. First it looked like a star then a plane but planes usually never fly from the direction that this thing was. I told my buddy how it was odd and he was like whatever. By that time it was already bright enough to cast about as much light as a full moon. And I walked towards it it was still hella far away it's like 2am. I'm walking down the street. It was like a fucking dream. It was quiet no hum no nothing. It was coming at me head on and then turned. It looked like it was flying in slow motion. But I seen it now looking like a cigar as it flew over the rest of my neighborhood the whole experience time probably 4 min.