M-Theory is a theoretical framework in physics that aims to unify the five different string theories. It suggests that the fundamental building blocks of the universe are not just one-dimensional strings, but can also include higher-dimensional objects called branes. This idea helps to explain various phenomena in the universe, including gravity and the behavior of particles. One of the exciting aspects of M-Theory is that it proposes an 11-dimensional universe, which is beyond our usual three dimensions of space and one of time. This extra dimension allows for new possibilities in understanding the fundamental forces of nature and could lead to breakthroughs in our comprehension of the cosmos.