Embark on a captivating journey through the cosmos in this 1-hour 34-minute lecture by renowned physicist Ashoke Sen, part of the "Kaapi with Kuriosity" public lecture series. Explore the fascinating realms of elementary particle physics and cosmology, delving into the smallest constituents of matter and the grandest structures of the universe. Discover the Standard Model of particle physics, its successes and limitations, and the challenges of incorporating gravity into a unified theory. Unravel the mysteries of the universe's origins, including the concept of cosmic inflation and the puzzles of dark matter and dark energy. Learn about string theory as a potential framework for unifying all fundamental forces. Engage with complex scientific concepts presented in an accessible manner, suitable for curious minds from high school students to working professionals, and participate in an enlightening Q&A session to further satisfy your scientific curiosity.