: The most vital principle, where the distance between frames determines the speed and "feel" of a movement.

The story of animation mechanics is a transition from the to the mathematical . The #1 Animation Principle (How To In-Between)

In the early 20th century, animation was less an art form and more a series of "tricks" used to baffle film audiences. It was an era of discovery, where the were being decoded by a handful of pioneers who realized that life could be simulated through a precise understanding of physics and persistence of vision . The Blueprint: Decoding the Laws of Life