UFOs are difficult to truly classify. Some levels of identification seem easy, such as saucer-shaped, orb, triangle, etc. while others appear to shape shift. So how do you classify something that begins as one shape and moments later is a different shape? In our humble opinion UFOs come in a myriad of shapes and sizes making it extremely difficult to create a proper classification system. However UFO investigator Berlinghoff Rasmussen has given the subject a great deal of thought and you can see his infographic below.