This week's featured article

Simkin glider gun is a glider gun, found by Michael Simkin on April 28, 2015. It consists of a Herschel running in two period60 conduits, producing infinite copies of the first natural glider. In terms of its singlebarreled form it is the smallest known gun, with 36 cells, sharing the record with the Gosper glider gun. In its pseudoperiod, boatbit form and its doublebarrelled form it is the absolute record holder, with 35 and 29 cells respectively.

In the news

 December 2: FWKnightship constructs a (6,3)c/1024 knightship caterpillar with an almost completely new support mechanism, reusing only the overunity glider production mechanism from the halfbaked knightship.
 November 29: Charity Engine discovers a new longestlasting known natural diehard, a 16 × 16 soup lasting 1,413 generations before completely dying out, via apgsearch.
 November 22: Keith Amling proves that 37P4H1V0 is the unique smallest possible period4 c/4 orthogonal spaceship in terms of its minimum population of 37 cells.
 November 18December 2: David Bell extends earlier work on period116 c/4 spaceships and c/4 rakes by EvinZL and May13, respectively.
 November 16: Several people extend a new beehive factory partial by Mitchell Riley to produce conduits, usually with repeat time 90, that convert gliders to other active objects.
 November 15: Keith Amling proves that 30P5H2V0 is the unique smallest possible period5 2c/5 orthogonal spaceship in terms of its minimum population of 30 cells.
 November 14: Mitchell Riley discovers 44P49, the smallest known period49 oscillator, which quickly leads to a number of related SKOP records being broken.
 November 1213: Keith Amling completes a census of all period3 ships up to 49 cells and all period2 ships up to 80 cells which discovers 6 new c/3 ships and proves that 64P2H1V0 is the smallest possible period2 ship.
 November 810: Keith Amling discovers a highclearance variant of a known p28 c/4 diagonal puffer and combines two such engines to form a p116 puffer. Two days later, praosylen modifies the p116 puffer to form a dirty rake and Evin uses this dirty rake to construct a clean p116 rake. The previous lowest known c/4 diagonal rake period was 4508.

Pattern collection

The LifeWiki contains one of the most comprehensive catalogues of patterns available on the internet. Within it you will find:


Did you know...

 ... that a spaceship made of spaceships was only a theoretical concept in Conway's Life (except for 0E0P metacell patterns that were much too large to run) until an explicit universal constructor based example was constructed in 2021?
 ... that glider constructions for the B29, X66, halfX66 with HWSS, Pushalong 1, 25P3H1V0.1, 30P5H2V0, 30P4H2V0, a pufferfish spaceship, and the weekender were discovered in 2015 — more than twice as many new spaceship recipes as had been completed in the entire previous decade?
 ... that in 2014 and 2015 alone, more new spaceship syntheses have been completed than were found in all the years between 1970 and 2013?
 ... that as of September 2023 there are 253 different still lifes known to be constructible by colliding four or fewer gliders, but this list is almost certainly not complete?
 ... that in 2014 a new natural infinite growth pattern was discovered, starting from a symmetric random starting configuration?
 ... that the first selfconstructing Conway's Life pattern was built in 2010?
 ... that the first glider synthesis for a c/3 spaceship was completed in 2014?
 ... that the first "macrospaceship" gun (a Gemini spaceship gun) was constructed in 2010, followed by the HBK gun in January 2015 and a Demonoid gun in December 2015?
 ... that the waterbear was the first known highspeed oblique spaceship, many orders of magnitude faster than Gemini spaceships and halfbaked knightships?
 ... that there are no known direct reflectors for lightspeed wire signals, or for signals in 2c/3 wires, but that very large reflectors for these signals can be constructed using stable or periodic circuitry?

