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The document discusses the creation of a CSS animation library called BEAM, which was inspired by the fable of the rabbit and the tortoise. It takes a physics-based approach to animations, treating time as a continuous stream of inputs rather than discrete timed events. This allows for smoother, more natural looking motions that reflect principles of physics such as gravity. The document outlines the history and motivation behind BEAM, demonstrates its capabilities, and addresses some caveats to its implementation.Read less