Differences in Skin Color

Episode 1

If we were to walk from the tropics to Norway, what we would see is a continuous change in skin tone. And at no point along that trip would we be able to say, "Oh, this is the place in which we go from the dark race to the light race."

see also:
article
Ten Things Everyone Should Know About Race
by Larry Adelman
Some quick facts about race that help dispel common myths and misconceptions.
Q&A
Are we ready for a "colorblind" society?
episode 3
Q&A
Is there a gene that controls for skin color?
episode 1
Q&A
Is the caste system in India racialized?
episode 2