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(: Explore the most important physics discoveries that help us understand how the world and universe operate, and why things move and work the way they do. Learn about the scientific breakthroughs of Galileo, Sir Issac Newton, Albert Einstein, and more.

Watch the full Discovery Channel ? 100 Greatest Discoveries: Physics movie online at no cost in high-definition (HD) quality. No downloads needed—simply click to play and experience the excitement with English subtitles included for your convenience.