<human>:  How does holography work?
<bot>: Holography is a technique for capturing the 3D structure of an object using a laser. The laser illuminates a hologram, which is a two-dimensional object that contains all the information needed to reconstruct the 3D object. The laser is then moved around the object, and the hologram is recorded. When the hologram is viewed, the 3D image of the object is reconstructed.