UFO is a joke when there ain't mystery in the sky.

There is no UFO and also there is no alien, at least not in common mind nor reference.

If you want to be sure of unusual thing such as aliens or UFOs, then you have to think about it from an unusual way of thinking.

If you want to find wilier race by common sense, then you have just narrowed your searching area.

Regarding alien beings and UFO sightings, They're less about 'where' or 'when' to find, more about 'how' or using 'what' to identify.

There is no generally accepted procedure in identifying UFO.

You see a lot of UFOs with closed eyes and opened mind.