(David Pratt) 4. Physical parameters
UFOs come in an incredible variety of shapes, and there are very few instances where absolutely identical-looking UFOs have been independently sighted in different locations. UFOs in the shape of dumbbells, hats, and washtubs have been reported, as have machines flying through the air with moving wings. But many UFO enthusiasts prefer to ignore reports that do not conform to their conception of what extraterrestrial spacecraft should look like!














