[Andrew2]

I once asked the same question. A few years ago there was a supposedly genuine film of an 'alien autopsy' doing the rounds. It showed some 'surgeons' in white coats and masks investigating the dead body of 0ne of those 'grey' aliens with the big eyes. On the wall of the operating theatre was a phone with a curly wire and it just seemed wrong to me. The film was allegedly made in the late 40's.
The other giveaway was the 'film grain', which looked more like added electronic noise.
The film did indeed turn out to be fake. Surprise...