Pony express was the first completely natural infinite growth pattern to emerge from soup that was neither the block-laying switch engine nor the glider-producing switch engine, instead being a combination of both of these. It was found by Apple Bottom using Adam P. Goucher's apgsearch script on September 16, 2015, but was not added to the Catagolue census until September 28.
Generation 5000 of the soup the pony express was first found in, excluding escaped gliders.
- ↑ Apple Bottom (September 27, 2015). "Re: apgsearch v2.2". ConwayLife.com forums. Retrieved on November 3, 2018.
- ↑ Adam P. Goucher (September 28, 2015). "Re: Soup search results". ConwayLife.com forums. Retrieved on November 3, 2018.