… they have finally let people know there is an area 51 so I'm sure they have already built another one somewhere. perhaps underwater and that is why we are seeing these new UFO's called USO's unidentified submerged objects and USFO's unidentified submerged flying objects. Many sightings recently are from lights and crafts underwater and many go from the water to the air and fly off or land on the water sink and dive down like a sub.
Scientist suggest that there are at least 51 million earth like planets in the universe. Many of them are 10x's older than the earth. So we must have life that is probably so intelligent that we look like to them how we would see a caveman, very primitive. I"m sure others are in the primitive stage them selves but we can still learn so much from these.
Also who says the planet needs to be like ours? there are organisms on our planet that do not use oxygen or the normal nutrition's to survive. they live off of sulfur so who's to say there are not entire planets with intelligent creatures made much like those creatures on planets that we cannot survive on.