Who were Scythians?

These were the Scythians the topic discussion was referring to, AFAIK.  Not the 'Asiatic Scythians'.

The Saka were a group of many Iranic (not Persian) peoples/tribes, but it doesn't really matter whether they were Turkic or Iranic because they shared the nomadic lifestyle, they were just another of those horse-riding steppe nomads.

All Scythians were Saka but not all Saka were Scythians. Appearently, "Skythoi" (Scyth) was the Greek name for the people called "Saka Pradraya" (Saka Across The Sea) by the Persians.

You cannot come up nothing by only looking at religion in this subject. There is not a necessity that Turks can only belong to "this specific relegion".  They can believe in many different religions as history shows us.

The resemblence between  H'yaona and Hun is worth to make attention on it.

Yes. I am completely agreed with you.........

 It is known that, though of Iranic (I think that's the correct word!) origin, there where some mixing between Sakae/Scytians and other "asian-looking" races.

It is quite possible that, among the leading classes, political marriages would make ethnic mixing more common than among the common people.

At the Pazyryk kurgan, for instance, the man burried there is of "asian" stock (though I don't if it's turkic or mongol, or something else). Interestingly enoght, he had a fake beard. One can suppose that the beard was a symbol of masculinity and, due to his "asian" race, this chief had to wear a fake beard because he would lack a proper one (asians have much less beard that europeans).

In a recently discovered tomb in the Afghan border, the chief burried there is mixed "iranic-asian" as well, even if he is surrounded by Sakae items.

But anyway, and has far as I know, both from the Greek authors and for the remainning sources, the is no evidence whatsoever attesting the Scytians as nothing else but of Iranic stock. Where they of hunnic stock and I'm sure that the european authors would have written about it, namely by saying that the Scytians were ugly, bad looking fellows, etc., etc., etc., just like they did when regarding the Hunns (and unlike what they did regarding the Ephtalites, who looked similar to the persians, at least accordingly to chinese sources, and "didn't had ugly features" accordingly to Procopius).

(BTW, what's the difference between iranic, arian and persian?)

Best

Sikander

By "enzyme" I assume you mean lactase (which "breaks down" lactose--milk sugar).

This enzyme is produced by various beneficial bacteria, like lactobacillus acidophilus, used in making yogurt, kefir, etc.

The specific bacteria strains and fermentation recipe used for making koumiss (fermented mare's milk) was taken by the Russians, and used with cow's milk to make kefir.