Oxford professor argues invisible aliens are interbreeding with humans Watch
How can you be sure that it is biologically impossible for us to breed with them? Have you seen an alien before or are you using E.T. or Paul as your basis for alien anatomy?
I kinda want to know what they really look like, and I kinda don't.
Fair point, but we don't know. They may have been here for thousands of years and would have evolved plus adapted to our planet. Hence allowing themselves sufficient time to be able to breed with our women.
I think we can put this guy in the arts/social science/humanities looneys who needs to leave STEM to STEM researchers...