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 Haçienda in particular.
The duo completed university 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 June 1995, they released their fourth single, the first under their new identity. "Leave Home" was released on Junior Boy's Own, as a preview of the imminent debut album and became the band's first chart hit, peaking at No. 17.
In August 1995, the Chemical Brothers DJ'ed for Oasis at a Sheffield gig. The gig began to backfire when it became apparent that Liam Gallagher didn't seem to like any of the tracks they were spinning. The closest that they could come to pleasing him was the Happy Mondays' "Wrote For Luck". Gallagher proceeded to kick the Chemical Brothers off the turntables and procured a friend from The Verve to continue to DJ. He subsequently favoured psychedelic material to the displeasure of the crowd.
Around this period, The Stone Roses asked the Chemical Brothers to remix "Begging You", from their Second Coming album. After beginning work on a remix which they viewed as having potential, the Stone Roses changed their minds and the project was cancelled.
In October 1995, the duo returned to the Heavenly Sunday Social for a second and final run of DJ dates. They then became residents at the Heavenly Social on Saturdays at Turnmills. In November, The Chemical Brothers played the Astoria Theatre in London. At this time the Chems usually used a fusion of "Chemical Beats" and The Beatles' "Tomorrow Never Knows" as their encore. During the encore, however, Keith Flint from The Prodigy jumped up on stage to dance, wearing a t-shirt sporting the slogan "Occupation: mad bastard". A few from the crowd subsequently joined in. This resulted in a power cable being kicked loose, bringing the show to a temporary close. The Chemical Brothers confessed to not being too bothered; "because he's Keith from the Prodigy, and he can do whatever the fuck he likes" Rowlands said later. Just before Christmas, 1995, they played their biggest gig to date, with The Prodigy, at the Brixton Academy.
In January 1996, Exit Planet Dust went gold. The Chemical Brothers released their first new material in 6 months on Virgin, the "Loops Of Fury" EP. The four track release was limited to 20,000 copies. It entered the UK charts at #13. NME described the lead track as "splashing waves of synths across hard-hitting beats". The EP also contained a Dave Clarke remix of "Chemical Beats", and two other new tracks "Get Up On It Like This" and "(The Best Part Of) Breaking Up".
In February 1996, Select Magazine published a list of the 100 best albums of the 1990s thus far. "Exit Planet Dust" was listed at Number 39. In August 1996, The Chemical Brothers supported Oasis at Knebworth, where 125,000 people attended each of the two shows.
In March 1997, the Brothers released the second track from their forthcoming album, to give the world a further taster of what to expect. "Block Rockin' Beats" went straight to #1 in the UK, possibly thanks, this time, to its Schoolly D vocal sample and re-working of the bassline from 23 Skidoo's single "Coup. The NME named it Single Of The Week and said "It throbs like your head might if you had just done a length underwater in a swimming pool full of amyl." It later won them a Grammy Award for Best Rock Instrumental Performance.
In the US at this time, "Setting Sun" was sitting at Number 80 in the Billboard Top 100, after selling around 80,000 copies, an uncommon achievement for a European "dance" act. Sales from Exit Planet Dust were also around 150,000.
During the summer of 1997, the Brothers toured extensively, particularly in the States. They also became residents at Tokyo's Liquid Rooms. In August, the Chemical Brothers achieved rapprochement with the US Dust Brothers, and asked them to remix the forthcoming single "Elektrobank". They themselves also became highly sought-after for remixes for other artists. Metallica asked the Brothers several times to remix "Enter Sandman", but were repeatedly turned down. In September, the next single from Dig Your Own Hole, "Elektrobank" was released. In November, the pair played at Dublin's Point Theatre, with support from Carl Cox. They also began a US tour in Detroit.
At the end of the year, Dig Your Own Hole's final track, the nine minute-long "The Private Psychedelic Reel" gave rise to a limited-edition mini-EP of the same name. The b-side consisted of a live version of "Setting Sun", recorded at the Lowlands Festival, Netherlands on August 24, 1997. Also in December, following four sold-out US shows, The Chemical Brothers toured the UK, finishing with a sold-out gig at London's Brixton Academy.
In September 1998, a second mix album, Brothers Gonna Work It Out, was released. It contains some of their own tracks and remixes, as well as songs from artists who have influenced their sound, such as Renegade Soundwave, Meat Beat Manifesto, Carlos "After Dark" Berrios, and Kenny 'Dope' Gonzales.
In May 1999, The Chemical Brothers played three UK dates in Manchester, Sheffield and Brighton, their first since December 1997. Also that month, they released their first new original material in two years, a track called "Hey Boy, Hey Girl". This was more house influenced than hip-hop. In interviews at the time, Rowlands and Simons indicated that the track was inspired by nights out at Sheffield club "Gatecrasher". The track was also one of their more commercially accessible tracks and went to number 3 in the UK charts.
Later that summer, The Brothers headlined the Glastonbury dance tent on the Friday night, followed by a UK tour which ended in December and included Homelands Scotland on September 4. In November, "Out Of Control", featuring Sumner and Gillespie on vocals, was released as single. The release also contained the Sasha remix. The final single from Surrender, in February 2000, was the five track "Music: Response" EP, containing the title track and two remixes, plus Electronic Battle Weapon 4 named "Freak of the Week", and a track called "Enjoyed", which was essentially a remix of "Out Of Control" by the Brothers themselves.
A CD copy of Surrender was placed in the third Blue Peter time capsule, buried in January 2000.
In 2001, they were quite active with releases and live performances. Early in the year, they began working on a fourth album, provisionally titled "Chemical Four". The first track which fans got a taste of was "It Began In Afrika", as previously played in their DJ set in New York. The track would make its live debut in California in April 2001, at the Coachella Valley Music and Arts Festival. Another new track also got its public debut at Coachella, "Galaxy Bounce". As had become customary for their releases and experiments, "It Began In Afrika" was first pressed as a promo, as part of the "Electronic Battle Weapon" series. It received much airplay on dance music radio shows in the UK, and became more and more popular in clubs over the course of the summer. It also became one of the "anthems" in Ibiza as the summer progressed. It was given a full commercial single release in September, reaching #8 in the UK singles chart, even though no promotional video was made for the track.
Rowlands and Simons also remixed a track from Fatboy Slim's Halfway Between The Gutter And The Stars, entitled "Song For Shelter."
The album, Come with Us, was less well received than their previous albums, but nonetheless went straight in at #1 in the UK album charts in the first week of its release, selling 100,000 copies. In April, the title track from the album was released as a single with remixes by Fatboy Slim as part of a double-A sided release with "The Test".
During the summer of 2002, The Chemical Brothers traveled the festival circuit to promote the album. Later in 2002, they released two EPs, one specifically aimed at Japan and the other the US (entitled AmericanEP). Both contained remixes, live versions and B-sides.
One of their other major songs from this album was "Galaxy Bounce", which was popular and featured as the main title music for the Xbox game Project Gotham Racing. "Star Guitar" was featured as a song on the PSP's Lumines II.
Two other songs featured on a game on the PS2 a racing game title WRC II: Extreme are "Come with Us (Introduction)" and "Star Guitar (Title Screen)"; both are instrumental.
The Song My Elastic Eye from the "Come With Us" album was played in the 2004 movie The Butterfly Effect starring Ashton Kutcher and Amy Smart .
In late 2003 and 2004, The Chemical Brothers continued to work in the studio, on new material and a remix of "Slow" by Kylie Minogue. After being released on rare white label vinyl, it was subsequently given a commercial release in March on CD (on her next single "Red Blooded Woman") and on exclusive 12" vinyl picture disc (containing two other Kylie remixes). In Summer 2004 they returned to the festival circuit, including appearances at the Glastonbury Festival, Tokyo, Scotland and Ireland. They also visited South America for the first time, arriving at Chile, Argentina and Brazil. It was during these sets that they played new material, including "Acid Children", which proved to be one of the most popular new tracks.
In September 2004 The Chemical Brothers released the "seventh Electronic Battle Weapon". "Electronic Battle Weapon 7" was being released as a one-sided promo-only 12", containing "Acid Children". A marked departure from the Chemical Brothers' previous musical endeavours, it featured a screeching 303 bassline and a distinctive vocal sample; a pitch-altered sample of freddy's revenge proclaiming "You Are All My Children Now!", which is lifted from an old horror film, A Nightmare on Elm Street Part 2: Freddy's Revenge. It was coupled with the projection of a sinister clown mouthing these same words at their live gigs.
The Electronic Battle Weapon series of promo releases have typically been newly recorded Chemical Brothers tracks, released on promo to allow DJs to test them in a club environment, and to gauge their popularity.
"Galvanize", which features Q-Tip on vocals, was the first single to be taken from Push the Button, and premiered exclusively on iTunes. The single was released on January 17, 2005, and entered the UK chart at #3. The second single "Believe" (featuring Kele Okereke from Bloc Party) failed to crack top 10, but still made it into the top 20, peaking at #18. "The Boxer", featuring Tim Burgess, became the duo's first single to fail to crack the top 40.
The album and single "Galvanize" won a Grammy in the Grammy Awards of 2006. One of the songs in this album, "The Big Jump" appears in the video game Burnout Revenge, as well as Project Gotham Racing 3. The track "Surface To Air" features a pulsing chord progression and baseline reminiscent of the intro to The Strokes song "The Modern Age".
Electronic Battle Weapon 8 & 9 were debuted on Pete Tong's BBC Radio 1 show on December 8, 2006. The double sided vinyl was finally released just before The Chemical Brother's much anticipated New Years Eve gig at the famous Turnmills in London. The vinyl had a limited edition release worldwide and has been received well by fans, DJs and critics alike. Electronic Battle Weapon 8 at about six and a half minutes is very distinct from the 'big acid' style that the earlier battle weapons adhered to. It is characterised by 'thundering dirty drums' with a rising synth line, and to many it is perceived as being one of the most Euphoric tracks that the Chemicals have released. A version of this track features on the We Are The Night album and is entitled 'Saturate'. Electronic Battle Weapon 9 is typical Chemicals dancefloor track with their trademark vocoder vocals coupled with sirens and a basic 'tribal' melody.
At the same Turnmills gig, the Brothers also played a previously un-released song at midnight to welcome 2007 which went down well with the crowd. This track eventually emerged as Burst Generator, found on the album We Are The Night. Many are left wondering if the latest in the Electronic Battle Weapon series were simply one off genius pieces or signal a new direction they could take with the new album, perhaps swaying from their genre defining 'big beat' psychedelic albums of the past.
On March 21, 2007, The Chemical Brothers officially announced their forthcoming album on MySpace. The new album entitled We Are the Night, was released on July 2, 2007 in the United Kingdom and July 17, 2007 in the United States. The Chemicals cited a delay in the production of artwork for this delay. EMI subsequently released an online 'old-skool' The Chemical Brothers computer game as an apology. The track listing was released to the fans on the official mailing list on April 10th. The new album is heavily collaborated with the likes of Klaxons (on "All Rights Reversed"), Midlake (on "The Pills Won't Help You Now"), Ali Love (on "Do It Again") and Willy Mason (on "Battle Scars").
On April 12, 2007, Pete Tong again had the privilege of giving the world the very first preview of a Chemicals track. This time it was the first single "Do It Again" off their new album, aired on his BBC Radio One "In New Music We Trust" show. . The track is widely regarded as dance floor friendly, dominated by pop vocals and a minimalistic production approach. The track is regarded as a 'grower' after gaining mixed reviews after the first listen on Pete Tong's show, with its simplistic catchy vocals and electro beat. The official release of the single was June 4 (digital download) and June 14 (12", 7" and CD). The album went on general release in the UK on July 2nd.
In September 2007, The Chemical Brothers played a free live gig in Trafalgar Square as part of the Becks Fusions event. All who attended were provided with 3D glasses to view the on-screen visual effects.
In 2008, The Chemical Brothers' music will also be featured in a movie adaption of Irvine Welsh's best-selling novel Ecstasy: Three Tales of Chemical Romance.
The Chemical Brothers supplied a new track for the Heroes Soundtrack titled "Keep My Composure".
The Brothers have also played at many major festivals, from Glastonbury to the Reading and Leeds festival. They currently hold the record for most gigs performed in a year at the Brixton Academy. The brothers have infamously despite their high status in the mainstream, never appeared on Top of the Pops, with the use of music videos to replace the performance, sometimes accompanied by a video apologising for their absence. In 1999 a live US tour video of "Hey Boy, Hey Girl" was shown, even though the song was not in the top 40 at the time, and also released other singles before then at the time.
In addition to performing their own music they also hold regular DJ nights where they mix other artist's tracks (in the style of Brothers Gonna Work It Out).
As with their recorded albums The Chemical Brothers are well known for their incorporation of guest vocalists into their live performances. Notable appearances in recent gigs have included Bernard Sumner of New Order, who sang on the original "Out of Control", and Tim Burgess.
The duo also played at the launch event for the Wii gaming device.
On the night of the 1 September, 2007, The Chemical Brothers played at the main stage of the Electric Picnic to a crowd of around 20,000. The festival was however marred by the death of a 23 year-old fan. The incident occurred as The Chemical Brothers came to a climax at 2 a.m. early on the Sunday morning. Organiser John Reynolds extended his sympathies and said: "A young man took ill at the festival, was treated at the medical centre, removed to Port Laoise Hospital and was later pronounced dead." Police said they were not treating the death as suspicious. 
The Chemical Brothers appeared in Los Angeles on September 29, 2007, headlining the 13th Annual Nocturnal Wonderland Festival.
The duo was one of the head-liners for Roskilde Festival 2008 in Denmark. The festival is held from the 3rd-6th of July and is the biggest festival in Northern Europe.
Chemical Brothers played at London's Olympia Grand Hall on August 30, 2008. This was the first time any major band has played at Olympia's Grand Hall in over 10 years.