Twin hat (or twin peaks, or bi-hat) is a 17-cell still life that roughly consists of two hats.
Twin hat is the thirty-sixth most common still life in Achim Flammenkamp's census, being less common than block and dock but more common than beehive and dock;  it is the most common object in this census for which no four-glider synthesis is known. The twin hat is also the fourty-eighth most common object on Adam P. Goucher's Catagolue.
- ↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
- ↑ Adam P. Goucher. "Statistics". Catagolue. Retrieved on June 24, 2016.
- Twin hat at Eric Weisstein's Treasure Trove of Life