Knol was a Google project that aimed to include user-written articles on a range of topics. The project was led by Udi Manber of Google, announced December 13, 2007, and was opened in beta to the public on July 23, 2008 with a few hundred articles mostly in the health and medical field. Knol had no policies regarding sources or neutrality. Some Knol pages were opinion papers of one or more authors, and others described products for sale. Some articles were how-to articles or explain product use. Other people could post comments below an article, such as to refute opinions or reject product claims.

Lower-case, the term knol, which Google defined as a "unit of knowledge", referred to an article in the project. Several experts saw Knol as Google's attempt to compete with Wikipedia, while others pointed out the differences between the projects.

On January 16, 2009, Google announced that Knol had grown to 100,000 articles, and users from 197 countries visited Knol on an average day. Since then, the Public Library of Science (PLoS) Currents: Influenza and the Harvard University-sponsored forum for Healthcare Information Technology (HIT) Platform have utilized Knol-based collections for rapid exchange of research.

Tim Knol (Hoorn, September 12, 1989) is a Dutch singer-songwriter.

Knol was born and raised in Hoorn, where he started making music at the age of 10. Locally, he made an impression with the band Be Right Back in which he sang and played guitar. While playing in that band, he also worked on various side projects and recorded a couple of solo tracks. In May 2008 he played at De avond van het kippenvel in Utrecht, where he came in contact with Anne Soldaat, formerly of Daryll-Ann. Together they recorded some demos for Excelsior Recordings. In May 2009 he decided to quit his band, and start a solo career. In June 2009 the first result from his solo career, a cover version of Godley & Creme's Cry, appeared on the online compilation album Guilty pleasures. Other artists that appeared on that album were Silence Is Sexy and Solo.

During the Lowlands Festival in August 2009, Knol signed a record deal with Excelsior Recordings. His debut record received positive reviews in the Dutch media. On the album Knol is accopanied by Jacob de Greeuw, Jeroen Kleijn and Matthijs van Duijvenbode from Johan and Anne Soldaat and Reyer Zwart from Do-The-Undo. Knol first presented his songs as a support act for Johan, during their farewell tour in the second half of 2009. After a few try-out concerts, the first big performance of Knol with his new band was at the Noorderslag Festival in Groningen January 2010.

Harry Edward Nilsson III (June 15, 1941 – January 15, 1994) was an American singer-songwriter who achieved the peak of his commercial success in the early 1970s. On all but his earliest recordings he is credited as Nilsson. He is known for the hit singles "Everybody's Talkin'" (1969), "Without You" (1971), and "Coconut" (1972). Nilsson's career is also notable for the fact that he was one of the few major pop-rock recording artists of his era to achieve significant commercial success without ever performing major public concerts or undertaking regular tours.

He was awarded Grammys for two of his recordings; best male contemporary vocal in 1969 for "Everybody's Talkin'", the theme song to the Academy Award-winning movie Midnight Cowboy, and best male pop vocal in 1972 for "Without You."

Nilsson was born in the Bushwick section of Brooklyn, New York, in 1941. His paternal grandparents were Swedish circus performers and dancers, especially known for their "aerial ballet" (which is the title of one of Nilsson's albums). His father, Harry Edward Nilsson, Jr., abandoned the family when young Harry was three. An autobiographical reference to this is found in the opening to Nilsson's song "1941":

Mariah Carey (born March 27, 1970) is an American singer, songwriter, record producer, and actress. She made her recording debut in 1990 under the guidance of Columbia Records executive Tommy Mottola, and released her self-titled debut studio album, Mariah Carey. The album went multi-platinum and spawned four consecutive number one singles, on the U.S. Billboard Hot 100 chart. Following her marriage to Mottola in 1993, a series of hit records, including Emotions (1991), Music Box (1993) and Merry Christmas (1994), established her position as Columbia's highest-selling act. Daydream (1995), made music history when the second single, "One Sweet Day" a duet with Boyz II Men, spent a record sixteen weeks on top of the Billboard Hot 100, and remains the longest running number one song in US chart history. During the recording of the album Carey began to deviate from her pop background, and slowly traversed into R&B and Hip-hop. After her separation from Mottola, this musical change was evident with the release of Butterfly (1997).