This week's featured article

The glider (or featherweight spaceship) is the smallest, most common, and firstdiscovered spaceship. Its name is due in part to the fact that it is glide symmetric. It travels diagonally across the Life grid at a speed of c/4 and is often produced by randomlygenerated starting patterns. Gliders are important because they are easily produced (see Gosper glider gun), can be collided with each other to form more complicated objects (see glider synthesis), and can be used to transmit information over long distances.
The glider was found by Richard K. Guy in 1969 while Conway's group was attempting to track the evolution of the Rpentomino. It is often stated that John Conway himself discovered the glider, but he has said that it was Guy.

In the news

 January 29February 2: Keith Amling, with some help from Matthias Merzenich, discovers new c/4 diagonal spaceships ([1], [2], [3]) capable of eating a variety of objects including ships, blocks, boats, beacons, beehives, barges, loaves, tubs, toads, and mangoes.
 January 2628: Goldtiger997 completes a 259glider synthesis of 77P6H1V1, making it the first c/6 diagonal spaceship to be synthesized.
 January 22: iNoMed discovers the first true period53 glider gun based on a partial result by goldenratio.
 January 20: Adam P. Goucher proves that every finite phoenix has period 2.
 January 1415: Keith Amling discovers c/4 diagonal eaters for blocks and blinkers and uses the block eater to construct the first period40 c/4 diagonal ship. David Bell and May13 use these to reduce the p72, p80, and p116 rakes. Matthias Merzenich notices that an incidental reaction in the blinker eater allows a known ship to eat a glider stream and can also be used to complete the first c/4 diagonal ships of periods 28, 32, and 36.


Did you know...

 ... that there are four unrelated SKOPs for p7 with a population of 28: Burloaferimeter, 28P7.1, 28P7.2 and 28P7.3?
 ... that 84P199 is the current largest primeperiod oscillator that is enginebased?
 ... that seven spaceships have been proved to be the smallest possible for their speed and period: glider for period4 c/4 diagonal, LWSS for period4 c/2 orthogonal, 64P2H1V0 for period2 c/2 orthogonal, 30P5H2V0 for period5 2c/5 orthogonal, 25P3H1V0.1 and 25P3H1V0.2 for period3 c/3 orthogonal and 37P4H1V0 for period4 c/4 orthogonal?
 ... that the LWSS, MWSS and HWSS are the only known polyomino spaceships for more than 50 years?
 ..that Burloaferimeter is the only known oscillator with a heat lower than 2?
 ...that despite the Piheptomino being known for over 50 years and its notable forward motion, it has not been stabilised to a 3c/10 spaceship yet?
 ...that the only known orthogonal spaceships in nonstrobing outertotalistic rules with speed c/2 < v < c have v = 2c/3, though in strobing rules there are also known spaceships of speed 3c/4 and 5c/8?
 ...that the existence of spaceships in outertotalistic rules with B23 and S0 and without B01 has been disproven, but of the 8192 such rules without S0, there are spaceships (all of which are p2 photons) known in only 8?
 ...that the cyclic has been rediscovered no less than 12 times?
 ... that Dominoplex and B2ein3cijn4cnrwy5cnq6e/S1c2ai3acny4anqy5c6ek8 are the first twostate alien isotropic nontotalistic rules with explicitly constructed orthogonoids?

Pattern collection

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

