They do, what they are is still to be discovered. There are hundreds of reports every year of flying objects that are not readily identified. Of all those about %80 have logical explainations. The remaining %20 can't be explained. These are UFO's, unidentified flying objects. It doesn't mean they are alien spacecraft, they just can't be explained for one reason or another.
The instant they are found they cease to exist. They are found and then they are identified. Once identified they cease to be UFOs.
It is impossible to even speculate. There is no admitted proof that UFOs do exist and no hard information on propulsion.
Roswell Yes and Ufo's No
Extraterrestrial life forms-if they exist.
No accurate records exist.
No accurate records exist.
Yes.... People have seen UFOs.
No, but most believers don't need proof.
No accurate records exist.
There have been many people who claim to have witnessed both UFOs and aliens, however there is no proof available to the general public. If proof does indeed exist, it is held as confidential information by the government.
No they don't, and you ever tells you they do are lying
no people who think they see a UFO is a aircraft and aliens are fake well it all depends on what you believe. I myself think that the government hides things from us and a lot of things exist that we have no clue about. They may exist or not. Who knows? Not us.