This week's featured article
|
| Eater 1 (or fishhook or simply eater) was the first discovered eater. Its ability to eat various objects was discovered by Bill Gosper in 1971. It is the smallest still life that is neither radially symmetric nor symmetric through a line, and it is the thirteenth most common still life, being less common than mango but more common than long barge.
It only takes four generations to recover from being hit by a glider, making it the fastest-recovering glider eater, and it is also the smallest glider eater. As such, it appears as a stabilizer at the corner of dozens of oscillators including 36P22, buckaroo, P54 shuttle, pentoad, pre-pulsar shuttle 47, and snacker.
|
In the news
|
- February 10-11: Chris Rowett uses ikpx2 to discover several new moving objects, including a p120 2c/5 puffer and c/5 diagonal tubstretcher, tagalong, and spaceship.
- February 4-11: Tanner Jacobi, EvinZL, Louis-François Handfield and Sphenocorona find new Herschel-to-glider converters and variants of existing H-to-Gs: NW26T157b, NE30T17_NE1T22, NW10T137, SW-18T136 and a Spartan SE16T36b.
- January 11-February 5: Hartmut Holzwart completes several new chicken wire greyships with different widths of chicken wire, with specific examples constructed for widths 2 through 10 among others.
- January 25: Catagolue's B3/S23/C1 census reaches a total of one quadrillion objects.
- January 24: goldenratio and bubblegum construct a glider synthesis for edge-repair spaceship 1.
- January 17: wwei23 discovers 1320P7, a large but high-clearance period-7 sparker oscillator.
- January 16: Dylan Chen discovers 52513M, the new longest-lasting known methuselah within a 16×16 bounding box, just a week after the discovery of 50093M.
- January 16: Adam P. Goucher completes a 2c/5 waveguide for an oblique line of ants based on a partial result by Matthias Merzenich.
|
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 no pattern inside a 6×6 bounding box is a Garden of Eden?
- ... that Garden of Eden patterns with only 45 ON cells have been found?
- ... that it is known that no Garden of Eden patterns exist that are 1, 2, or 3 cells high, but that it is currently an open question whether a 4-cell-high GoE can be constructed?
- ... that 6-cell-high Garden of Eden patterns were constructed as far back as 1973, but 5-cell-high GoEs were unknown until Steven Eker found some in 2016?
- ... that in 2016, patterns were found that have great-great-grandparents but no great-great-great-grandparents?
- ... that no way is known for a 3×3 pattern to be tiled into an M×N rectangle to produce a Garden of Eden, but that there are 4×3, 4×4 and larger tiles that can be repeated in this way to produce GoEs?
- ... that there are spaceship stabilizations of agars?
- ... that block is the only known finite strict still life where each living cell has exactly 3 neighbours?
- ... that all strict still lifes up to and including 14 cells have been found by apgsearch in asymmetrical 16×16 soups?
- ... that c/2 orthogonal and c/4 diagonal were the only speeds of spaceships seen to emerge from asymmetric soups on Catagolue until 2020, when a loafer appeared naturally?
|
|
