Discussion Questions: 1. What do you think about the statement that human DNA is not highly different across people/races? 2. If people of all races are almost genetically identical and race is really a socially constructed concept rather than a genetic one, why do you suppose humans find it so important to create barriers between different groups of people and different geographic boundaries, etc.? 3. Scientists are consistently explaining that the planet Earth is one tiny speck in the vast expanse of the Cosmos. If extraterrestrial beings (i.e., aliens) from another planet were to visit us next week, how do you think the ways in which we categorize all sentient beings (racial groups and nationalities from the planet Earth and aliens from outer space) would change? Who would be in the in-group, and who would be in the out-group? .