Alien intervention in Homo Sapien genetics is certainly in the realm of Science fiction. Check out the 1967 film 'Quatermass and the pit'

https://www.amazon.co.uk/Quatermass-And-The-Pit-Blu-ray/dp/B00525QJYO

A more disturbing aspect is the transition from Homo Sapien to Homo Urbanus. Today for example I came across these in the supermarket;

http://www.mysupermarket.co.uk/asda-comp...atoes_800g.html

Pre peeled Maris Piper Potatoes! shocked Wrapped in a Cellophane Nitrogen purged atmosphere.

Barbarianism with knives or civilization with spoons?