When your doctor wants to see if your bone is broken, she asks for X-rays, which are visual representations of where the x-rays were absorbed or reflected off of various structures in the body. On a much smaller scale, biologists do the same thing to understand the inner workings of objects like viruses, proteins and microorganisms, but those structures are often so small that researchers need a lot more snapshots to get a good look at them. In a process called x-ray crystallography, researchers create crystals that have many copies of the same object. Then they shoot x-rays at it, and look at how the x-rays were absorbed or reflected to understand the molecules’ inner structure. They snap a lot of photos, then compile them into one complete 3D rendering.