According to the Bible, all humans on earth today are descended fromNoah and his wife, his three sons and their wives, and before that from Adam and Eve (Genesis 1-11). But today we have many different groups, often called “races,” with what seem to be greatly differing features. The most obvious of these is skin color. Many see this as a reason to doubt the Bible's record of history. They believe that the various groups could have arisen only by evolving separately over tens of thousands of years. However, as we shall see, this does not follow from the biological evidence.The Bible tells us how the population that descended from Noah'sfamily had one language and by living in one place were disobeying God's command to “fill the earth” (Genesis 9:1, 11:4). God confused their language, causing a break-up of the population into smaller groups which scattered over the earth (Genesis 11:8-9). Moderngenetics show how, following such a break-up of a population, variations in skin color, for example, can develop in only a few generations. There is good evidence that the various people groups we have today have not been separated for huge periods of time.