majority of our atmosphere.
The black outlines represent N2 molecules, and the gray outlines represent O2 molecules, which together form the majority of the atmosphere. (The ratio of gray to black molecules in this design also roughly mirrors the ratio of nitrogen to oxygen in real life.) The little white hearts represent the distribution of electrons within these molecules. The title is "A loving breath" in Italian, taken from one of my favorite Mozart arias (https://www.youtube.com/watch?v=ilD7XMEuq-M).