The Chemical Brothers are the English electronic music duo Tom Rowlands and Ed Simons (occasionally referred to as Chemical Tom and Chemical Ed). Initially they called themselves "The Dust Brothers", after the noted United States production duo of the same name, but the threat of legal action from the originals led them to change their name in 1995. Along with Fatboy Slim, The Crystal Method, and The Prodigy, as well as other acts they are pioneers of the big beat electronic dance genre which achieved mainstream popularity in the 1990s, and are known for high-quality live sets.

Ed Simons was born in Herne Hill, South London, England, on 9 June 1970 to a barrister mother and a father who was not around much when Simons was growing up. Simons' two main interests when he was young were airplanes and musicals. Simons attended two South London public schools, Alleyn's School and Dulwich College. During his school years, Ed developed a fondness for rare groove and Hip hop music, having frequented a club called The Mud Club from the age of 14. By the time he left school, his two main musical interests were two Manchester bands, New Order and The Smiths. After finishing school with 11 O levels and 3 A-levels, Ed continued on to study History, especially Late Medieval History, at the University of Manchester.

Tom Rowlands, a childhood classmate of Simons', was born on 11 January 1971 in Kingston upon Thames, London. When Rowlands was very young, his family relocated to Henley-on-Thames. He later attended Reading Blue Coat School in Berkshire, during which time he became obsessed with Scotland, developing a fondness for the bagpipes in particular. In his early teens, his interest in music broadened to other genres. Initially, some of his favourites included the Oh What a Lovely War soundtrack, 2-Tone, and the electro sounds of artists such as Heaven 17, Kraftwerk, New Order, and Cabaret Voltaire. He described the first Public Enemy album as the record that probably changed his life, and commented that Miuzi Weighs a Ton was one of the most amazing records he had ever heard. Rowlands also started collecting hip hop records by artists like Eric B and Schoolly D. Rowlands left school with similar accomplishments to Simons', achieving 9 O levels and 3 A levels. For University, he followed Simons to Manchester primarily to immerse himself in its music scene in general and the Hacienda in particular.

Rowlands was also in a band called Ariel prior to meeting up with Simons. Ariel was formed in London by Rowlands and his friends Brendan and Matt before they all moved up to Manchester. Their first single was "Sea of Beats".This was essentially a white label, before Philip Brown set up Echo Logik Records, their first promo was Bokadilo, Other songs, released on 12" included "Mustn't Grumble" and their most well-known, "Rollercoaster". After a year on Echo Logik they signed to the record label, deConstruction, they insisted that they get a female singer and they recruited former Xpansions frontwoman Sally Ann Marsh, and after some disappointing songs like "Let It Slide" (Rowlands would later describe it as "a stinker") the band fell apart. One of the last things Ariel did was the song "T Baby" which was remixed by the pair.

Rowlands and Simons then started to DJ at a club called "Naked Under Leather", in the back of a pub, in 1992 under the alias of "The 237 Turbo Nutters" (named after the number of their house on Dickenson Road in Manchester and a reference to their Blackburn raving days). The pair would play hip hop, techno and house.

They called themselves The Dust Brothers, after the US production duo famous for their work with the Beastie Boys. After a while, they began to run out of suitable instrumental hip hop tracks to use, so they started to make their own. Using a Hitachi hi-fi system, a computer, a sampler and a keyboard, they recorded "Song To The Siren", which sampled Dead Can Dance. "Song To The Siren" was released on their own record label, called "Diamond Records" (after Ed's nickname). In October 1992, they pressed 500 white-label copies and took them to various dance record shops around London, but none would play it, saying that it was too slow (The track played at 111 BPM). They sent a copy to London DJ Andrew Weatherall, who made it a permanent fixture in his DJ sets. Weatherall also signed the band to his Junior Boy's Own label. In May 1993, Junior Boy's Own released 'Song To The Siren'.

The duo completed Universities with good results, each obtaining upper-second class degrees. Around June 1993, the Dust Brothers did their first remixes. The first was "Packet Of Peace" for Justin Robertson's Lionrock outfit, followed by tracks for Leftfield, Republica and The Sandals. Late in 1993, The Dust Brothers completed work on their Fourteenth Century Sky EP, released in January 1994. It contained the ground-breaking "Chemical Beats", which epitomized the duo's genre defining big beat sound, later taken up by Fatboy Slim and many more. The EP also contained "One Too Many Mornings", which for the first time showed the less intense, more chilled-out side of The Dust Brothers. Both "One Too Many Mornings" and "Chemical Beats" would later appear on their debut album. Fourteenth Century Sky was followed later in 1993 by the My Mercury Mouth EP. "Chemical Beats" was also part of the soundtrack for the first edition of the Wipeout games series, having been featured in Wipeout for the PlayStation in 1995.

In October 1994, The Dust Brothers became resident DJs at the small, but hugely influential Heavenly Sunday Social Club at the Albany pub in London's Great Portland Street. The likes of Noel Gallagher, Paul Weller, James Dean Bradfield and Tim Burgess were regular visitors. The Dust Brothers were subsequently asked to remix tracks by Manic Street Preachers and The Charlatans, plus Primal Scream's "Jailbird" and The Prodigy's "Voodoo People". These two remixes received television exposure, being playlisted by MTV Europe's "The Party Zone" in 1995. Early in 1994, The Dust Brothers were approached in the club one Sunday by Noel Gallagher, from Oasis, who at the time was becoming one of the most prominent guitar bands in Britain. Gallagher told the duo that he had a Balearic inspired track which he had written, which he would like the Dust Brothers to remix. However, over time, Gallagher changed his mind, and in the end the Brothers did not remix it. The track was "Wonderwall".

In March 1995, The Dust Brothers began their first international tour, which included the United States - where they played with Orbital and Underworld - then a series of European festivals. Also around this time, the original Dust Brothers threatened legal action over the use of their name, and so Rowlands and Simons had to decide on a new name quickly. They decided to then call themselves "The Chemical Brothers" after "Chemical Beats" (Simons' grandmother had suggested they call themselves "The Grit Brothers").

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