A professor from Oxford University has reportedly claimed invisible alien bugs are interbreeding with humans in an attempt to save both species.

Young-hae Chi, a member of the university's Faculty of Oriental Studies, told the university's student newspaper he's written a book on the subject.

"They are all conducting some kind of biological experiment, including the production of a hybrid," he told the Oxford Student.

His Korean-language book, Alien Visitations and the End of Humanity, says there are four types of aliens - "small; tall and bold; aliens with scales and snake eyes; and finally, insect-like aliens" - the latter of which call the shots.

"I don't think they are from far away, they are just next to us, we can't see them," he told the paper in a story that's now been picked up by publications with much bigger print runs, including the New York Post, the Sunday Times and the Evening Standard.

"We can use an analogy of fish which can think and perceive things only in the way they can and humans also perceive only in the way we can, so our perception of the world is limited by our organs."

But why? According to Chi, they share a biosphere with us - and we're messing it up.

"They come not for the sake of us, but for the sake of them, their survival - but their survival is actually our survival as well, the survival of the entire biosphere. That is where I progressed in developing my theory and I'm still looking for more evidence to support my view."

The wild claims are a mix of The X-Files - in which aliens seek to create a human-alien hybrid species in order to colonise Earth - and 1950s sci-fi classic The Day the Earth Stood Still, in which an alien visits Earth to save humanity from its own worst impulses.

"It is not only scientists and theologians, but also non-human species who appear to be greatly concerned about the survivability of the human species," Chi told the Oxford Student.

Chi is not the first otherwise-educated person to claim aliens are here. In 2017 an aerospace tycoon working with NASA said he was "absolutely convinced" we're being visited from afar, and researchers last year suggested they're here, but invisible to humans because they're made of dark matter.

Newshub.