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An Oxford University academic says aliens are breeding with humans to produce a hyrid species capable of saving the planet from major disasters like climate change and nuclear war.

Young-hae Chi, an instructor in Korean at Oxford's Oriental Institute, said the primary aim of the aliens was to ensure their own survival, but in doing so could protect the human race.

He first made the claims in a lecture in 2012 when he cited an “abduction researcher” from the US who believes the hybrids are already walking among us, the Oxford Student newspaper reported.

He has since written a book on the subject called Alien Visitations and the End of Humanity.

In the book, which is written in Korean, he states that there are four types of aliens, including a ‘small’ variety, ‘tall and bold’, ‘scaly with snake eyes’ and ‘insect-like’.

Mr Chi claims the insects are the highest ranking aliens and give orders to the lower ranks.

Humans are unable to experience the comprehensive system in which the aliens exist because our organs limit our perception, he adds.

In his lecture, titled Alien Abduction and the Environmental Crisis, he presented his theory concerning the presence of aliens on Earth.

Dr Chi said it was “not only scientists and theologians, but also non-human species who appear to be greatly concerned about the survivability of the human species”.

“It may be more or less assumed that the hybrid project is a response to this impending demise of human civilisation,” he added.