What exactly makes up the universe?
Science tells us that some of the tiniest building blocks constructing our world are atoms. An atom is composed of layers of electrons as well as a nucleus, which is made up of protons and neutrons. Go even deeper and you‘ll find that protons and neutrons are made up of extremely tiny particles called quarks. Go deeper still and you’ll approach the neutrino—one of the tiniest particles presently known by modern science. Neutrinos are extremely tiny; so tiny that some physicists say that they do not have any mass. Millions of these particles are sent out by the sun every day, passing through our bodies as if we did not exist. If our microscopic journey continues toward an even smaller particle, we begin to enter a strange land, arousing questions that even disturb quantum physicists.
