[Oswczrdz]

All humans are different, but there are genetical characteristics (e.g. hair/eyes colour, size, facial trait, etc.) that enable us to categorise them into groups. It is not as simple as saying there are 3 main races (Caucasoid, Negroid, Mongoloid). Looking at the people of India, Central Asia and the Middle East, we clearly see that it is more complex. But even within (what's looks like) a clear-cut group, there are many 'subcategories'. For example, among Caucasoids (=Europeans), we can notice very clearly the difference between the North Germanic type (tall, blond, blue eyes, smaller nose, squarer face...) or Celtic type (blue eyes, dark or red hair, rounder face), and Italic type (dark hair and eyes, taller and longer nose, deep features), Hispanic type (less pronounced features than Italic), Greek type (straight nose, sometimes blue eyes), etc.

Even within one of these groups, we could divide further. E.g. The Frankic Germanic type is not the same as Scandinavian Germanic or Anglo-Saxon Germanic.

Things get more complicated once we look at mixed race regions, like the South of Germany (Celtic, Germanic and Latin, possibly with a bit of Slavic).

I this regard I am quite surprised at the ethnic homogenity of North East Asia (China, Korea, Japan). Some Japanese clearly have Ainu features, but otherwise they are almost impossible to tell appart (much more difficult than to tell two Germanic group apart).

In SE Asia, Indonesian and Malaysian are very easily distinguishable from Thai or Burmese, who are also easily disntinguishable from the Khmer (Cambodians). But there are so many ethnic tribes in Northern Thailand, Laos or Vietnam that it complicated things quite a bit.

In Africa, there is no way to confuse a Bantu (Central and South Africa; slightest fairer skin, round face, flat nose) from an Ethiopian (face/skull closer to Caucasoid, smaller nose, squarer face and much darker skin than Bantu).

I would put the Arabs in a separate division from Caucasoid, Negroid or Mongoloid. Dravidian people (originally from Southern India) are also a separate division. But today's Indians are mainly a mix of Caucasoid Aryans and Dravidians, which explains how two Indians can look completely different (some with skin as fair as a Mediterranean, others as dark as an Ethiopian + different features).

So is there races or subdivisions within humans ? Yes. Can we scientifically classify them, as we would classify different species of plants and animals (e.g. the hundreds of races of dog or horses) ? Yes. Can we crossbreed them and get new races ? Yes. There is no reason humans should be different from other life beings.