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Welcome to LifeWiki,
the wiki for Conway's Game of Life.
Currently contains 2,168 articles.
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This week's featured article

Caterloopillar diagram small.png

Caterloopillar is the name given to a family of spaceships containing two major parts - the front and the back. In Caterloopillar each part has the properties of a universal constructor, and thus each part is constructing the building blocks of the other part, while also reading and moving a construction tape. As the name suggests, this creates somewhat paradoxical design, similar to the "strange loop" concept.

The basic Caterloopillar design can be trivially adapted to produce spaceships with an infinite number of different speeds -- in theory, any rational speed strictly less than c/4.

The Caterloopillar was voted the Pattern of the Year 2016 on ConwayLife.com.

In the news

Pattern collection

The LifeWiki contains one of the most comprehensive catalogues of patterns available on the internet. Within it you will find:
Download.gif Download pattern collection
4.5 MB .zip archive containing the 3500+ RLE pattern files used on the wiki

Did you know...

  • ... that 24 ten-cell patterns exhibit infinite growth, with 17 unique pattern types, but that it has been proven that no nine-cell pattern exhibits infinite growth?
  • ... that all still lifes up to 20 bits have a known glider synthesis, but it is still not known whether all still lifes are synthesizable?
  • ... that the French kiss remained without a glider synthesis until 2013?
  • ... that Adam P. Goucher's distributed Catagolue soup-search project, started in February 2015, has tested several orders of magnitude more random soups than any previous such project, and has contributed to the reduction of many glider construction recipes?
  • ... that with the appearance of the 0E0P metacell, the number of periods for which strict volatility 1 oscillators were known went from 12 to infinity?
  • ... that Copperhead is not only the first c/10 orthogonal spaceship ever found, but also remarkably compact for a pattern not discovered until 2016?
  • ... that loafer is the fifth smallest non-flotilla spaceship, but was discovered 43 years after the four spaceships smaller than it?
  • ... that despite being the fourth smallest non-flotilla orthogonal spaceship, loafer did not appear from a single randomly generated soup until 2020?
  • ... that all known glider eaters take at least four ticks to recover to their original state after eating a glider?
  • ... that the formerly smallest 31c/240 spaceship does not make use of the 31c/240 reaction?          
Showing 10 items out of 129 More did you know...