A professor who studied alien life has offered his unusual theory by claiming that alien greys were created using human DNA from abductees.

Despite their popularisation in movies like ET, no scientific evidence has ever been offered to support the existence of alien greys.

However, Professor David Jacobs – a professor of history at Temple University specialising in Ufology – has consistently claimed that aliens are walking the Earth, and are even planning for a “full invasion”.

And now, speaking on the Richard Dolan Show, the wacky professor has put forward his theory about how alien greys came to be, suggesting that they may have been created through tests on human abductees.

“When people say they were abducted, they almost always talk about grey aliens,” he acknowledged, before outlining his theory.

“Because we were being abducted, they used a little bit of us in making grey aliens.

“The reason I’m saying that the grey aliens might have human DNA in them is because grey aliens have two huge black eyes.

“They have two holes on the sides of their heads for ears; got to have that, that’s important, you can’t exist normally without being able to hear around your head.”

David also acknowledged that alien greys are often characterised as having two holes for a nose, like humans. But, he claimed that the anomaly was the fact that greys are believed to have a slit for a mouth, which he suggested doesn’t make sense.

“The question is, why do they have a slit for a mouth? They do not breathe, there’s no evidence for them breathing, and they get very very close to people, sometimes even touching foreheads,” he continued.

“I’ve asked people, ‘do you feel their breath on your face?’ The answer is always no. They don’t have lungs, they have very thin little bodies, there’s no back and forth of the lungs expanding and contracting.

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“They don’t talk, everything is telepathic. They don’t eat in the normal way that we eat. So why is that slit for a mouth there? The point is that there’s probably human DNA in those grey aliens… which allowed for the growth of grey aliens.

“I don’t know but that’s my best guess, and it all boils down to the slit for a mouth, which they should not have.”

This comes as an ex-NASA scientist recently claimed that humans will make contact with aliens within the “next handful of years”.

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