This week's featured article

The pi calculator is a device constructed by Adam P. Goucher in February 2010, which calculates the decimal digits of pi and displays them in the Life universe as 8×10 dot matrix characters.
The actual calculation is done in binary, using a streaming spigot algorithm based on linear fractional transformations. The pi calculator is made up of a 188state computer connected to a printing device via period8 regulators and a binarytodecimal conversion mechanism. The complete pattern can be found in Golly's Very Large Patterns online archive.

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 without the use of adjustable glider loops, there are no known oscillators with periods 43, 49 or 53?
 ... that the largest interesting pattern constructed, the caterpillar, contains over 11 million cells?
 ... that the Gosper glider gun was the first pattern to be discovered that exhibits infinite growth?
 ... that the blocklaying switch engine and the gliderproducing switch engine (and various combinations of two switch engines) are the only infinitelygrowing patterns that are known to have ever occurred naturally from an asymmetric random starting configuration?
 ... that oscillators are known that oscillate at all periods other than 19, 23, 34, 38 and 41?
 ... that the pentadecathlon and the blinker are the only known oscillators that are polyominos in more than one phase?
 ... that it is impossible for a period 3 oscillator to be a phoenix?
 ... that the methuselah with the longest known lifespan, 40514M, lasts for over 40,000 generations before stabilizing? The secondplace holder, Fred, runs for over 35,000 ticks.
 ... that replicators with quadratic population growth are known to exist in Conway's Game of Life, but none have yet been found?
 ... that the first known period 37 and 51 oscillators were found in 2009?

