Life Is Omniperiodic
In the cellular automaton called the Game of Life, a configuration of cells that returns to a prior state after steps is called a period- oscillator. Prior to the year 2023, it was unknown if period 19 or period 41 oscillators existed. Due to recent discoveries by Mitchell Riley and Nico Brown , oscillators of all periods are now known.
 LifeWiki. "Oscillator." (Jul 27, 2023) conwaylife.com/wiki/Oscillator.