"Half Hours with Modern Scientists: Lectures and Essays" is a collection of scientific texts by famous 19th century scientists Thomas Henry Huxley, George Frederick Barker, Edward Drinker Cope, James Hutchison Stirling and John Tyndall. In this book, they address a number of important scientific questions, the leading achievements of their era, and their own research in biology, physics, chemistry, and other scientific disciplines. Each author reveals his view of science and demonstrates his erudition and rich experience. This book will be a great source of knowledge and inspiration for anyone interested in science and education.