Ratter is quite correct. I do think people from other planets came here in the dim and distant past and I think there is evidence available to support that if anyone cares to look. However, I’m not convinced they’re visiting us now. That said, long before the advent of drones, my husband and I once saw a very strange object in the sky. It was early afternoon when a silver ball appeared travelling silently just above the rooftops of a four-storey block of flats, so very low. It appeared to have glass at the top, off which the sunlight was glinting. It wasn't enormous - I'd say perhaps 15 or so feet in diameter and I can only compare the mode of its transit to a ball that had been thrown. We ran across the road watching it for as long as it took to disappear behind the adjacent blocks of flats. I have no idea what it was.