What Biology has to say about the ‘Hybridization’ of the Human ‘Sub-Species’ (in French)

As you can see, not all scientists are politically controlled (yet), so please do enjoy this video in French, based on an Icelandic study:

An English source stating similar things: https://en.wikipedia.org/wiki/Outbreeding_depression

The actual study (in English): http://www.d.umn.edu/~jetterso/documents/Helgasonetal.2008.pdf

A brief summary in English: it’s not good for us.