Are You Sure That You've Seen Aliens?

Effars: There is a feeling amongt many that the aliens are already here. Many people would say, we know they're there because we've seen you. It's very unlikely that if you do actually go to another star system, where you repeatedly probed a you'll still have an inkling of that. The fact that so many people think that we are being visited, i mean, it doesn't late physics. And even with slow rockets of the type that we can manufacture, it would be possible,  very tedious, but would be possible from one star system to another. Let's at least look at the evidence.