String theory says the universe has hidden dimensions
String theory proposes our universe is built from tiny vibrating strings in hidden dimensions, offering a potential way to unify all of physics.
Imagine the universe's smallest parts aren't tiny dots, but minuscule vibrating strings. This is string theory, which suggests these vibrations create everything from electrons to gravity. To work, the theory needs more than our familiar four dimensions; it typically requires 10 or 11. These extra dimensions are thought to be curled up incredibly small, making them undetectable in everyday life. This mathematical idea could finally unite quantum mechanics and Einstein's theory of gravity, a long-sought goal in physics. Though unproven, string theory has already inspired major advances in mathematics.