**Research Firsts Exhibition: Image and accompanying text submitted by David Mahon and the Nuclear and Hadron Physics Research Group** ![two pixelated images with pale blue green areas and one smaller red area near their centre][1] Muography is an exciting non-destructive testing field that uses natural cosmic radiation to inspect the contents of some of the most enigmatic structures on Earth. A decade ago, University of Glasgow researchers produced the world’s first 3D images of uranium inside a steel-shielded, concrete-filled container using muography technology. These images were reconstructed using a particle detector that measures the scattering of ‘muons’ to produce images based on material density. Ten years later and our spinout Lynkeos Technology has a muography system installed on the Sellafield nuclear site to inspect and improve the safety of nuclear waste containers. [1]: https://mfr.osf.io/export?url=https://osf.io/download/7etxn/?direct=&mode=render&format=2400x2400.jpeg