X-ray crystallography is like taking a picture of a crystal. With x-ray crystallography, scientists can look at the way atoms are arranged inside the crystal to learn about the crystal. Scientists use special instruments to measure how x-rays move through the crystal. Then they can use that data to create a picture of the crystal. It's like using x-rays to take a picture of the crystal and seeing what it looks like inside. This helps scientists learn about the different crystals and how they are made.