DZero control room. The DZero Experiment consists of a worldwide collaboration of scientists conducting research on the fundamental nature of matter. The experiment is located at the world's premier high-energy accelerator, the Tevatron Collider, at the Fermilab. The research is focused on precise studies of interactions of protons and antiprotons at the highest available energies. It involves an intense search for subatomic clues that reveal the character of the building blocks of the universe. Beams of protons and antiprotons collide at nearly the speed of light in Fermilab's Tevatron accelerator. Millions of times a second, protons and antiprotons burst into showers of secondary particles: quarks, electrons, muons, and neutrinos. By studying the particles, physicists learn about the elementary building blocks and fundamental forces that determine the nature of matter and the ultimate structure and evolution of the universe. The DZero is essentially a huge "camera" that takes more than a million "snapshots" of particle collisions every second. Allowing physicists to count particles, identify their tracks, measure their energy, record their time of flight and distinguish one particle from another.