The history of perpetual motion machines is a fascinating journey that spans centuries, reflecting the human quest for knowledge and understanding of the laws of physics. Perpetual motion machines are theoretical devices that can operate indefinitely without an external energy source, thereby violating the first or second laws of thermodynamics. Here’s a timeline of significant developments in the history of these machines: ### Ancient and Medieval Concepts - **Ancient Thoughts**: The concept of perpetual motion dates back to ancient civilizations.
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