|View static image|
|Pattern type||Stable reflector|
|Number of cells||52|
|Discovered by||Mike Playle|
|Year of discovery||2013|
The snark is a 90° stable glider reflector discovered by Mike Playle in April 2013. It is made up of two eaters, a block and a 31-bit still life, the heart of the Snark, also known as the Petersen. It is currently the fastest and the smallest 90° stable glider reflector, both in terms of the population and the bounding box.
The reaction was discovered by Dietrich Leithner about 1998, but it consumed another block. A catalyst that could replace the block was found with Bellman, a program for searching catalytic reactions, developed by Mike Playle.
Given its small repeat time, the snark made oscillators of previously unknown periods of 43 and 53 trivial. It also made most large symmetrical Herschel-loop guns obsolete, since it is now possible to make use of the Herschel gliders with a shorter path of the Herschel track itself. 
- Mike Playle (April 25, 2013). "Just the place for a Snark!". Retrieved on March 27, 2016.
- Freywa (June 8, 2013). "Re: Just the place for a Snark!". Retrieved on April 5, 2017.
- Adam P. Goucher (February 17, 2010). "Re: Incomplete search patterns - try to complete". Retrieved on May 8, 2013.
- Matthias Merzenich (April 25, 2013). "Re: Just the place for a Snark!". Retrieved on March 27, 2016.
- Dave Greene (June 8, 2013). "Re: Just the place for a Snark!". Retrieved on April 5, 2017.