NASA statement this week opened my mind up to non-human intelligence on Earth. I started looking into when dinosaurs were really taken seriously, and it wasn't until 1800. Think about how many humans ignored that evidence. Maybe some intelligence evolved on Earth and had brains that found natural physics and chemistry more teachable than our learning in school classrooms, found ways to open dimensions and just left Earth for some place better, but still comes back to check us lower species, ha.