Explore the fascinating history of black holes and gravitational waves in this 21-minute lecture by renowned physicist C. V. Vishveshwara. Delivered at the International Centre for Theoretical Sciences in Bengaluru, India, this talk is part of a special event celebrating the groundbreaking discovery of gravitational waves. Gain insights into the origins of these cosmic phenomena, their detection methods, and the revolutionary impact on our understanding of the universe. Learn how this milestone opens up a new window for observing the cosmos, complementing traditional electromagnetic wave observations. Delve into the contributions of the Indian scientific community in this field and understand the significance of this discovery for future astrophysical research.