My wishlist: See what's out there (aliens, of course, or even just habitable worlds) or find out exactly where and what we came from: What Earth was really lik

My wishlist: See what's out there (aliens, of course, or even just habitable worlds) or find out exactly where and what we came from: What Earth was really like before us, were there any other civilizations, human or otherwise, before the oldest ones we currently know. Or just about anything that upturns our current understanding of reality.