What are the implications of string theory's extra dimensions on our understanding of the fundamental forces in the universe, and how does it reconcile with observable phenomena?
Discuss the theoretical frameworks proposed to unify gravity with quantum mechanics, such as loop quantum gravity, and their potential to revolutionize our comprehension of space-time.
Furthermore, explore the hypothetical existence of parallel universes within the multiverse theory and their impact on cosmology and the nature of reality.
Finally, analyze the experimental methods and technological advancements necessary to test these theoretical constructs, pushing the boundaries of human knowledge in the realm of theoretical physics.