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no.grey aliens are believed to be present in earth from a long time ago.some believe that one or two grey aliens survived the ufo crash incident at Roswell in 1947.so if that is true then they already existed and are extraterrestrial beings but if this is false then how can we know that after a hundred thousand years later we will be like grey aliens!!
hope i helped :)
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∙ 10y ago
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Can aliens be humans from the future?
No one knows for sure whether aliens actually exist; therefore, no one know what they might be. Most likely, imagination.
Where do earth invaders live?
You mean Aliens. No where but the closest place we humans believe there might be Aliens on Mars but later on in the future our advanced human minds might find out
Why are aliens gray?
As no aliens have ever been seen it is not known what colour they might be.
Why don't aliens won't kill humans?
"Why wont aliens kill humans" ... Theyre afraid.
What do gray aliens look like?
Aliens have never been observed by any credible witness.
If aliens are real are humans just aliens to them?
'Aliens' are real. In any given country, a foreigner may be described as an Alien.
Did aliens bring humans?
no, they did not.
Are Afghans aliens?
Afghans are not aliens. They are humans just like everyone else.
How the aliens built the pyramids?
Aliens didn't build the pyramids, actual humans did that.
Do aliens eat humans?
No aliens are known to exist, so your question is unanswerable.
Are humans considered aliens on Earth?
no
What do periwinkles do?
humans aliens bugs
