Well i doubt they were. Also Area 51 is alittle too heavily guarded, you know they are hiding something in there for sure trying to hide it from all us 'gullible" people who they think a cover story will make us think nothing is wrong or nothings up. Pyramids aren't alien built, but human built, the stone henge is human built i bet, the statues were carved by man, roswell is really an alien crashed UFO, bermuda triangle is either a portal to somewhere, some mad scientist, or something we aren't thinking of, crop circles are ALL hoaxes from those dumb people who go around doing this stuff. Most of these mysteries i'm sure have a logical explination.