Why did scientists use tools other than microscopes to solve the structure of DNA?

Scientists used tools other than microscopes, such as X-ray crystallography, to solve the structure of DNA because microscopes alone could not provide the necessary resolution to visualize the molecule's atomic details. X-ray diffraction data allowed researchers to analyze the pattern of X-rays scattered by crystallized DNA, revealing critical information about its three-dimensional structure. Additionally, techniques like model building and chemical analysis complemented the X-ray data, leading to a more comprehensive understanding of DNA's double helix configuration.