How many races of humans?
358973
Where are you from? An alien? I am not in a lab to observe people. By thy way, I listen to "Don't think twice, It´s all right" by Bob Dylan.
134248
it's the same with how many races and nations there are.\npeople have different belief and different languages.
387319
We are all one as a human race yet we are all diverse in our thoughts, emotions, and actions.  This delicate balance is what keeps the human race going.
908427
race, religion, culture
5362
According to the CIA World Factbook, as of July 2005, there was an estimated 6,446,131,400 living on the planet. \n\nBear in mind, the number is only an estimate but provides a reasonable snapshot of the world's population.
19605
USA...We have all ethnics here..Caucasians, African-Americans, Chinese, Hispanic, Indian, etc...What more could you want?...haha...
483263
As many as  we are exposed to.\n\nDon't tell a child that there is a difference, and he will simply assimilate everything.
609691
Billions and billions of people
397855
Nobody knows, approximately 2 million species have been identified as currently inhabiting the earth, but extrapolations based on the rate of discovery of species and other factors give figures ranging from 3 million to 80 million species.
385098
there is not such a thing as a racial stock. the concept of races was an invention of the colonialist European 19th century, who tried to make biological categories of people.\nNowdays, with developments of genetics we know that the three main races as defined in that period doesn't corespond to biological realities.  Genetically there is one human specie, that's all, inside wich one you can find any  variation possible of individual characteristics in a continuum.\n\nOnly some countries in the world such as the USA continues to classify people in these imaginary categories, to maintain domination of one group in particular.
592471
Seven answers. All incorrect.\n\nThe answer is Homo sapiens. \n\nSpelling people. Spelling.
390509
'Race' is largely an empirical observation, based more than anything else on skin colour. Recent DNA evidence shows, for example, much more variance between two different groups of 'black' Africans than between one 'black' African and one 'white' European. So the word 'race' is ceasing to have any meaningful use as a word as we learn more about Genetics. As all humans can have (fertile) children with each other, we are all definitely the same species. I don't know anything about penguins, but I hear different prefixes ('Emperor' penguin, for example) so I guess that they have more than one species and thus are more variant than Homo Sapiens.
132094
Nothing, they are humans just like everyone else. We all belong to the same race, that is the human race.
228902
too many of us to count. (I am white, I came to US about 10 years ago, even though my ancestors had nothing to do with it I did get asked that question because of the color of my skin, which sounds pretty racist to me)
998661
When there became different races.
1077917
The population of the earth is 6.25 billion. The population of the U.S. is in excess of 300,000,000. Mud people, quit breeding.
886381
1 human\n2 human\n3 human\n4 human\n5 human\nWe will all be judged