Today's featured article
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Pufferfish is a puffer discovered by Richard Schank in 2014. It consists of a pair of B-heptominoes whose debris is stabilised by a backend that travels at the same speed, c/2. It is the first known c/2 object that doesn't have any parts of periods 2 or 4. In 2014 Ivan Fomichev found a non-trivial (dependent) c/2 fuse of period 36 for pufferfish's exhaust, that enabled the assembly of the first wholly high-period c/2 spaceship and rake.
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In the news
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Did you know...
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- ... that more stable seed constellations for moving objects were completed in 2020 than in all preceding years put together?
- ... that Don Woods developed the text adventure game Colossal Cave Adventure with Will Crowther, who was previously Dave Greene's father's roommate for a time at MIT?
- ... that Rob's p16, with only 21 cells and fitting in a 9 × 8 bounding box, was only discovered via a large-scale apgsearch soup search in 2020?
- ... that the minimum one-cell thick solid line that produces escaping gliders has 56 cells?
- ... that the smallest known oscillators of periods 3, 4, 8, and 15, all have exactly 12 cells in their smallest phase?
- ... that a solid 83 × 83 square produces four unices at the corners?
- ... that a strictly volatile period-4 oscillator was not found until 2021 despite a statorless p4 being known since 1973, and the smallest known example contains a whopping 416 cells?
- ... that hitting a pre-block with a glider on a certain lane can output either an LWSS or MWSS, depending only on a one-tick change in the timing?
- ... that the clock is almost 5,000 times rarer than the toad, despite both having 6 cells and fitting in a 4 × 4 bounding box?
- ... that the quadpole is more common than the tripole in random soup, due to a relatively common bottleneck reaction involving a century variant hitting a ship?
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Pattern collection
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The LifeWiki contains one of the most comprehensive catalogues of patterns available on the internet. Within it you will find:
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