Quantum fields
Some say everything is made of atoms, but this is far from true. Light, radio, and other radiations aren’t made of atoms. Protons, neutrons, and electrons aren’t made of atoms, although atoms are made of them. Most importantly, 95% of the universe’s energy comes in the form of dark matter and dark energy, and these aren’t made of atoms. The central message of our most fundamental physical theory, namely quantum physics, is that everything is made of quantized fields.