Scientific racism was one of the most harmful misuses of knowledge in modern history. It used the language of #science, measurement, classification, and progress to support false ideas about human hierarchy. Although it presented itself as objective research, it was shaped by #bias, colonial power, social inequality, and political interests. This article studies scientific racism as a historical case of how knowledge can be misused when research is separated from #ethics, soc

Photography changed the way human beings understand #time, #memory, #science, and #evidence. Before photography, most visual records depended on drawing, painting, engraving, or written description. These methods were valuable, but they were shaped strongly by the hand, skill, imagination, and social position of the maker. The work of Nicéphore Niépce marked a turning point because it showed that light itself could help create a durable image. His early experiments in #heliog