This book contains 50 essays about Ukrainian scientists who have made a significant contribution to the world treasury of science and culture. The author narrates about prominent personalities whose names were silenced in the Soviet times, it was forbidden to write about them, and many of them were expunged from the scientific and cultural heritage of Ukraine. It is essential to publish biographies of famous Ukrainians because the history of world culture will not be complete without their accomplishments. Since only memory has a future, only a people knowing its history will never become a nation of the blind. This publication is aimed at pleasing a wide range of readers.