A fern is any one of a group of about 12,000 species of plants belonging to the botanical group known as Pteridophyta. Unlike mosses, they have xylem and phloem (making them vascular plants). They have stems, leaves, and roots like other vascular plants. Ferns reproduce via spores and have neither seeds nor flowers.

By far the largest group of ferns are the leptosporangiate ferns, but ferns as defined here (also called monilophytes) include horsetails, whisk ferns, marattioid ferns, and ophioglossoid ferns. The term pteridophyte also refers to ferns and a few other seedless vascular plants (see classification section below).

Ferns first appear in the fossil record 360 million years ago in the Carboniferous but many of the current families and species did not appear until roughly 145 million years ago in the early Cretaceous (after flowering plants came to dominate many environments).

Ferns are not of major economic importance, but some are grown or gathered for food, as ornamental plants, for remediating contaminated soils, and have been the subject of research for their ability to remove some chemical pollutants from the air. Some are significant weeds. They also play a role in mythology, medicine, and art.

Zachary Knight "Zach" Galifianakis ( /ˌɡælɨfəˈnækɨs/ GAL-i-fə-NAK-iss; born October 1, 1969) is an American stand-up comedian and actor known for his numerous film and television appearances including his own Comedy Central Presents special. While initially more of an "underground" comedian, he garnered mainstream attention for his role as Alan Garner in the comedy film The Hangover and its sequel The Hangover Part II.

Zach Galifianakis was born in Wilkesboro, North Carolina. His mother, Mary Frances (née Cashion), ran a community center for the arts, and his father, Harry Galifianakis, was a heating oil vendor. Galifianakis' paternal grandparents emigrated from Crete, Greece, and Galifianakis was baptized in his father's Greek Orthodox faith. His mother is of Scots-Irish descent. He has two siblings, a younger sister, Merritt, and an older brother, Greg. His uncle, Nick Galifianakis, was a congressman from North Carolina between 1967 and 1973. He attended Wilkes Central High School, and subsequently attended but did not graduate from North Carolina State University, where he was a communications major.

Steven John "Steve" Carell ( /kəˈrɛl/; born August 16, 1962) is an American comedian, actor, voice artist, producer, writer, and director. Although Carell is notable for his role on The Daily Show with Jon Stewart, he found greater fame in the late 2000s for playing Michael Scott on The Office. He has also starred in lead roles in the films The 40-Year-Old Virgin, Little Miss Sunshine, Evan Almighty, Dan in Real Life, Get Smart, Date Night, Dinner for Schmucks, and Crazy, Stupid, Love.; and voiced characters in the animated films Over the Hedge, Horton Hears a Who!, and Despicable Me. Carell was nominated as "America's funniest man" in Life magazine, and received a Golden Globe Award for Best Actor in a Television Comedy Series for playing the lead role of Michael Scott for The Office in 2006.

Carell, the youngest of four brothers, was born at Emerson Hospital in Concord, Massachusetts, and was raised in nearby Acton by his parents, Harriet T. (née Koch), a psychiatric nurse, and Edwin A. Carell, an electrical engineer. His maternal uncle, Stanley Koch, worked with Allen B. DuMont to create cathode ray tubes. Carell's paternal grandfather was Italian; his father was born with the surname "Caroselli", later shortening it to "Carell". Carell was raised Roman Catholic, and was educated at The Fenn School and Middlesex School. Carell also played ice hockey as a teenager for his high school.^{[citation needed]} He played the fife, performing with other members of his family, and later joined a reenacting group portraying the 10th (North Lincoln) Regiment of Foot. Carell attributed his interest in history to this, in which he earned his degree from Denison University in Granville, Ohio in 1984. While at Denison, Carell was a member of Burpee's Seedy Theatrical Company, a student-run improvisational comedy troupe.

Justin Drew Bieber ( /ˈbiːbər/ BEE-bər, born March 1, 1994) is a Canadian Pop/R&B singer-songwriter, musician, and actor. Bieber was discovered in 2008 by Scooter Braun, who came across Bieber's videos on YouTube and later became his manager. Braun arranged for him to meet with Usher in Atlanta, Georgia, and Bieber was soon signed to Raymond Braun Media Group (RBMG), a joint venture between Braun and Usher, and then to a recording contract with Island Records offered by L.A. Reid. Bieber's debut single, "One Time", was released in 2009 and peaked in the top twenty in Canada and charted in the top thirty in several international markets. His debut album, the seven-track EP My World, followed in November 2009, and was soon certified platinum in the United States. He became the first artist to have seven songs from a debut album chart on the Billboard Hot 100.

Stefan Konrad Raab (born 20 October 1966) is a German entertainer, television host, comedian and musician. Raab began his television career hosting the comedy show Vivasion in 1993 and has been hosting the late-night comedy show TV total since 1999. He became well known in 1994 after composing a hit single spoofing national football coach Berti Vogts in 1994. Raab has also been the creator of a number of other television shows, such as Schlag den Raab and Bundesvision Song Contest. He is considered the "most powerful man in German entertainment television".

Raab is also known for his recurring role as producer, writer and performer of German entries to the Eurovision Song Contest. He was involved in the organisation of the national pre-selection show Unser Star für Oslo (Our Star for Oslo), in which Germany's winning entry at the 2010 contest in Oslo was determined.

Raab attended Jesuit boarding school Aloisiuskolleg in Bonn. Before entering the entertainment business, he worked as a butcher and studied law before dropping-out of university after five semesters. Other than this, there is little known about Raab's private life, which he deliberately keeps hidden from the media. He has a girlfriend, Nike and two daughters (born 2004 and 2006).