 SCP-642-1 and SCP-642-2 are a pair of geothermal hot springs, located in the region of Northern Iceland, approximately 6 km apart. Immersion of a sexually mature female mammal in SCP-641's waters induces the lidicus reproduction. That is to say, fusion of two unfertilized mature ova, or polar bodies present in pre-ovulatory follicles, to produce a diploid zygote, genetically identical to its lone parent. The chemical and biological properties of SCP-642-1 result in rapid early development of the zygote, usually at a rate 2 to 4 times faster than normal for the species.