Scientific Simplification Episode 4: String Theory

Imagine an orange hanging from a tree. A simple question: what is this orange made of? To answer, we zoom in. First, we see the molecules. Zooming in further, we discover the atoms. Inside the atom, almost everything is empty: electrons orbit around a tiny nucleus. If we zoom in even more on this nucleus, we find protons and neutrons. For a long time, it was believed that these particles were elementary. However, as we continue our exploration, we...