Through our actions we are able to find out about the world. We sense our surroundings and know the effect of our actions.
In the 20th century quantal electronic atomic discoveries enabled us to identify energy changes as fundamental physical processes. Many new particles including neutrino and quark have have been demonstrated primary constituents of matter.
In the 21st century elementary particle interaction experiments continue to produce results adding to our knowledge of matter. We are able to comprehend these interactions as functions of energies interchanges of the universe.
Elementary particles are also discovered freely through the cosmos. Energies of the whole universe come together make these particles whose interactions are functions of large scale interchanges of the cosmos we sense.