Atom bomb’s unexpected souvenir, and the weight-loss drug that may be helping breast cancer patients Science Notebook left (a) Using nanoscale tomography, copper-rich droplets inside the red trinitite were mapped. The image shows metallic spheres in orange scattered through the glassy silicate, shown in blue. (b) The newly discovered clathrate is built from repeating silicon lattices, which can trap calcium atoms, along with traces of copper and iron.