Protons and neutrons (known as nucleons) are the fundamental building blocks of all atomic nuclei that make up essentially all the visible matter in the universe, including the stars, the planets, and us. More than 50 years of study has revealed that nucleons are composed of elementary particles called quarks and gluons, whose interactions and dynamics are governed by Quantum Chromodynamics (QCD). However, many profound questions remain. In this talk, Jianwei Qiu of Jefferson Lab will demonstrate that the newly-upgraded CEBAF facility and the future Electron-Ion Collider are two complementary and necessary facilities capable of exploring the inner structure of nucleons and nuclei at sub-femtometer distance scale, enabling a new emerging science and technology: Nuclear Femtography. These facilities will help address the most compelling unanswered questions about the elementary building blocks of our visible world, taking us to the next frontier of the Standard Model of physics.