New Tools for Self-Construction: b3s23life.blogspot.com/2018/11

Self-constructing spaceships in Conway's Game of Life are getting smaller, more visually clear (not just looking like a line) and more varied. And there's a hint of a "metacell" that can simulate Life or other cellular automata, with empty space as its off state, so you could start any simulation with finitely many live cells. The key to all this is new software to find glider salvos that build constellations of still lifes.

@11011110
Metacells exist.
Conway's Game of Life implemented in Conway's Game of Life:
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