String Theory and Cosmology: Physics Beyond the Known

String theory proposes that the universe’s fundamental building blocks are tiny vibrating strings.
These strings can vibrate in different ways, giving rise to particles like quarks and electrons.
The theory naturally includes gravity, making it a candidate for uniting all forces.
String theory requires extra spatial dimensions—up to 10 or 11 in total.
In cosmology, it offers possible explanations for the Big Bang and cosmic inflation.
String theory suggests our universe may be part of a multiverse with countless variations.
Brane cosmology, from string theory, envisions our universe as a “membrane” in higher dimensions.
It provides mathematical tools for exploring black holes and their mysterious entropy.
While elegant, string theory lacks direct experimental evidence so far.
Its union with cosmology could one day explain the deepest mysteries of space and time.