String theory aimed to unify all fundamental forces by modeling particles as tiny vibrating strings. It offered mathematical beauty—but also led to complex challenges like extra dimensions and a vast “landscape” of solutions (~10⁵⁰⁰). Despite early hopes, many physicists now question its physical testability and predictive power. While the idea of a vibrational universe remains compelling, the road to unification may lie elsewhere. | International Space Federation

String theory is a theoretical framework in physics that attempts to describe all fundamental particles and forces in the universe in terms of one-dimensional "strings" rather than point-like particles. These strings can vibrate at different frequencies, and each vibration corresponds to a different particle or force. String theory seeks to unify Einstein's theory of general relativity, which describes gravity on large scales, with quantum mechanics, which deals with the behavior of particles on