Fumarole is a period 5 oscillator that was found by Dean Hickerson in September 1989. In terms of its 7×8 bounding box, it is the smallest known period 5 oscillator. On September 1, 1995, Noam Elkies found a way to non-trivially combine two fumaroles and a blinker into a period 10 oscillator, shown below.[1] In February 2000 Stephen Silver found a 7-glider synthesis of this oscillator.[2]
Image gallery
 Noam Elkies' period 10 oscillator involving two fumaroles and a blinker
RLE: here
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