Test tube baby is a period 2 oscillator, being the smallest oscillator to support the two-cell domino rotor. It and its variants are occasionally considered to be billiard tables.
Test tube baby is about the twenty-fifth most common naturally-occurring oscillator in Achim Flammenkamp's census, being less common than cis-beacon on anvil and more common than octagon 2.
It is the most common billiard table naturally, depending on the definition of billiard table.
- ↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
- 14P2.7 at Heinrich Koenig's Game of Life Object Catalogs