Nested structures are commonly found throughout nature and art, whether they be in the form of tree rings, Russian dolls, or Wassily Kandinsky’s famous 1913 abstract painting Color Study: Squares with Concentric Circles. Now in a new study, chemists have constructed giant nested supramolecules or “supramolecular Kandinsky circles,” some of which are more than 30,000 times heavier than a hydrogen atom. The scientists demonstrate that these supramolecules are highly toxic to methicillin-resistant Staphylococcus aureus (MRSA), potentially providing a new method for fighting these deadly pathogens.