Ok, I am not supporting bestiality here. But, I just came to know about a Dogxim, a dog fox hybrid and I had known for a long time that horses and donkeys can breed (to produce a mule). So, I was just curious, can humans breed with any other animals closely related to us?
I assume closely related hominids which are now extinct. Neanderthal DNA is present in current human strains, which means they didn't even speciate (though potentially successful gestation was rarer).
Why am I writing like an alien nerd observing humans?