There is no evidence that proves any of them are even extraterrestrial for certain. There is no Evidence that proves any of them are not extraterrestrial for certain.
I don't think there is. Science can only prove what can be observed.
A:No. A Christian could have what he or she regards as a religious experience and a Hindu could have a very similar religious experience. In both cases, this proves no more than that they are devout followers of their relative faiths. The Christian's experience does not prove that God exists, any more than the Hindu's religious experience proves that Brahma or Vishnu exists.
Where humans and alcohol are, UFOs will be.
the correct answer is UFOs thanks for asking
There have been reports of sightings of white UFOs.
Depends what you mean by UFOs. If you mean 'spaceships with little green men' nobody has proved that such visits have ever taken place, and indeed, given the vastness of space, it is unlikely that they ever will. Some strange visual phenomena have been observed for which there is no explanation as yet; by their very nature no explanation for them exists.
The ones who study UFOs are called Ufologist. They study every thing about unidentified flying objects (UFOs).
Please check the related links for information about UFOs.
UFOs can go as high as your imagination allows.
Since UFOs are unidentified, it is unknown what is inside of them.
No, UFOs are not technically extinct, they are just rare to see.