Satanism is a group of ideological and philosophical beliefs based on Satan. Contemporary religious practice of Satanism began with the founding of the atheistic Church of Satan by Anton LaVey in the United States in 1966, although a few historical precedents exist. Prior to the public practice, Satanism existed primarily as an accusation by various Christian groups toward perceived ideological opponents, rather than a self-identity. Satanism, and the concept of Satan, has also been used by artists and entertainers for symbolic expression.
In the mathematical field of graph theory, the Petersen graph is an undirected graph with 10 vertices and 15 edges. It is a small graph that serves as a useful example and counterexample for many problems in graph theory. The Petersen graph is named after Julius Petersen, who in 1898 constructed it to be the smallest bridgeless cubic graph with no three-edge-coloring.
Hippoboscoidea is a superfamily of the Calyptratae. The flies in this superfamily are blood-feeding obligate parasites of their hosts. Four families are often placed here:
William Louis Petersen is an American actor and producer. He is best known for his role as Gil Grissom in the CBS drama series CSI: Crime Scene Investigation (2000–2015), for which he won a Screen Actors Guild Award and was nominated for a Golden Globe Award; he was further nominated for three Primetime Emmy Awards as a producer of the show. He reprised his role as Gil Grissom in the sequel CSI: Vegas, which premiered on October 6, 2021.
Christopher Scott Petersen is a former American football coach who was most recently the head coach at the University of Washington. Previously the head coach for eight seasons at Boise State University, Petersen guided the Broncos to two BCS bowl wins: the 2007 and 2010 Fiesta Bowls. He is the first two-time winner of the Paul "Bear" Bryant Award, which he won in 2006 and 2009. Petersen also won the Bobby Dodd Coach of the Year Award in 2010. At Washington, Petersen led the Huskies to the College Football Playoff in 2016, but fell to Alabama in the Peach Bowl. Petersen announced his resignation on December 2, 2019, to be effective after the team's bowl game.
Juncaginaceae is a family of flowering plants, recognized by most taxonomists for the past few decades. It is also known as the arrowgrass family. It includes 3 genera with a total of 34 known species.
The Streblidae are a family of flies in the superfamily Hippoboscoidea, and together with their relatives the Nycteribiidae, are known as bat flies. They are winged or wingless ectoparasites of bats, and often have long legs. They appear to be host-specific, with different species of bat flies occurring only on particular species of bat hosts, sometimes with multiple species of flies sharing a host bat.
In topological graph theory, an embedding of a graph on a surface is a representation of on in which points of are associated with vertices and simple arcs are associated with edges in such a way that:
Gomphus is a genus of cantharelloid fungi in the family Gomphaceae. Once presumed to be related to chanterelles, molecular study has shown them to be allied with stinkhorns and fairy clubs. The type species of the genus is the pig's ear (G. clavatus).
Blastocladiomycota is one of the currently recognized phyla within the kingdom Fungi. Blastocladiomycota was originally the order Blastocladiales within the phylum Chytridiomycota until molecular and zoospore ultrastructural characters were used to demonstrate it was not monophyletic with Chytridiomycota. The order was first erected by Petersen for a single genus, Blastocladia, which was originally considered a member of the oomycetes. Accordingly, members of Blastocladiomycota are often referred to colloquially as "chytrids." However, some feel "chytrid" should refer only to members of Chytridiomycota. Thus, members of Blastocladiomyota are commonly called "blastoclads" by mycologists. Alternatively, members of Blastocladiomycota, Chytridiomycota, and Neocallimastigomycota lumped together as the zoosporic true fungi. Blastocladiomycota contains 5 families and approximately 12 genera. This early diverging branch of kingdom Fungi is the first to exhibit alternation of generations. As well, two (once) popular model organisms—Allomyces macrogynus and Blastocladiella emersonii—belong to this phylum.
Mya is a genus of saltwater clams, marine bivalve molluscs in the family Myidae. They are widespread and abundant in northern waters. Commonly known as Ipswich clams, soft-shell clam or steamers, they are routinely used as a food source for humans.
In the mathematical field of graph theory, the Möbius–Kantor graph is a symmetric bipartite cubic graph with 16 vertices and 24 edges named after August Ferdinand Möbius and Seligmann Kantor. It can be defined as the generalized Petersen graph G(8,3): that is, it is formed by the vertices of an octagon, connected to the vertices of an eight-point star in which each point of the star is connected to the points three steps away from it.
Nils Petersen is a German professional footballer who plays as a forward for Bundesliga club SC Freiburg and the Germany national team. He appeared in the 2016 Summer Olympics and remains the first and only German footballer who has scored five goals in a single game with the national team.
Campiglossa is a genus of fruit flies in the family Tephritidae. There are at least 190 described species in Campiglossa.
Nemapogon is a genus of the fungus moth family, Tineidae. Therein, it belongs to the subfamily Nemapogoninae. As evident by its name, it is the type genus of its subfamily.
Gymnopus is a genus of fungus in the family Omphalotaceae. The genus has a widespread, cosmopolitan distribution and contains about 300 species.
Clavaria is a genus of fungi in the family Clavariaceae. Species of Clavaria produce basidiocarps that are either cylindrical to club-shaped or branched and coral-like. They are often grouped with similar-looking species from other genera, when they are collectively known as the clavarioid fungi. All Clavaria species are terrestrial and most are believed to be saprotrophic. In Europe, they are typical of old, mossy, unimproved grassland. In North America and elsewhere, they are more commonly found in woodlands.
Multiclavula is a genus of basidiolichens in the family Hydnaceae. The widespread genus contains 14 species.
Froggattisca is a genus of cave-dwelling antlions, that is, the genus belongs to the family Myrmeleontidae.
