A fifth of university scientists claim to have seen a UFO.
Researchers polled more than 1,000 academics from 144 universities and asked if they or somebody close to them has ever witnessed "unidentified aerial phenomena".
One in five said that they had and 37 per cent suggested that more research is required into close encounters with UFOs.
The study from Louisville University in the US found that those working in art and design, anthropology or religious studies were more likely to report sightings but so were around a fifth of biologists and a third of physicists.
One said: "I have seen UFOs twice. I know they exist and we don't have that level of technology. I used to tell people, but they thought I was crazy or lying, now I'm silent."
Another added: "My entire family and I witnessed a UFO around 1976. It was over our house."