Problem: Mastodon is an American heavy metal band from Atlanta, Georgia, formed in 2000. The group is composed of bassist Troy Sanders, guitarists Brent Hinds and Bill Kelliher, and drummer Brann Dailor, all of whom perform vocals in studio (with the exception of Bill Kelliher). They all perform vocals at live shows. Their musical style features progressive concepts and unique instrumentation.

The band's second full-length album, Leviathan, was released in 2004. It is a concept album loosely based on Herman Melville's novel Moby-Dick. The band received critical acclaim for Leviathan and the record was named album of the year by Kerrang! and Terrorizer. "Blood and Thunder" which featured Clutch vocalist Neil Fallon was chosen as one of the most important recordings of the decade by National Public Radio in November 2009, and that the entire album epitomizes " a phenomenal decade for metal". Leviathan also ranked second in a list by Metal Hammer of the best albums of 2004. The band went on tour in support of the album, playing throughout North America and Europe in The Unholy Alliance tour along with Slayer and Lamb of God and later on with Slipknot. "Iron Tusk", the fifth track on the album, can be found on the soundtrack of the skateboarding video game Tony Hawk's American Wasteland and in 2K Sports video game NHL 2K9. "Blood and Thunder" is featured in the video games Need for Speed: Most Wanted, Project Gotham Racing 3, and Saints Row. "Blood and Thunder" was added as a playable track on all instruments in Guitar Hero: Metallica and was featured in Japanese music games Drummania V2 and Guitarfreaks V2. It has also been released as downloadable content for Rock Band 3, with Pro Guitar support also available at extra cost. Leviathan was followed by the 2006 release of Call of the Mastodon, a remastered collection of the band's first nine songs, and a DVD of interviews and concert footage called The Workhorse Chronicles that includes material from the band's early days as a five-piece. The band has stated that "Call of the Mastodon" is their third studio album even though the album is a compilation album. These two releases were the band's last for Relapse Records, as they would later go on to sign with Warner Bros. Mastodon also recorded a cover version of Metallica's "Orion" for a 2006 Kerrang! tribute album marking the twentieth anniversary of the release of Master of Puppets.

Did they collaborate with any other artists?

Answer with quotes: Blood and Thunder" which featured Clutch vocalist Neil Fallon

Question:
King Crimson are an English progressive rock band formed in London in 1968. King Crimson have been influential both on the early 1970s progressive rock movement and numerous contemporary artists. The band has undergone numerous formations throughout its history of which 21 musicians have been members; since October 2017 it has consisted of Robert Fripp, Jakko Jakszyk, Tony Levin, Mel Collins, Pat Mastelotto, Gavin Harrison, Jeremy Stacey and Bill Rieflin. Fripp is the only consistent member of the group and is considered the band's leader and driving force.
After a search for new musicians, Fripp and Sinfield secured a returning Collins and Ian Wallace on drums. Auditions for a singer included those from Bryan Ferry and John Gaydon, the band's manager,. The position went to Raymond "Boz" Burrell. Bassist John Wetton was invited to join, but declined (at the time) in order to play with Family. Rick Kemp also declined an offer to join, leaving Fripp and Wallace teaching Burrell to play bass rather than continue auditions. Though he had not played bass before, Burrell had played enough rhythm guitar to assist him in learning the instrument. With the line-up complete, King Crimson toured in 1971 for the first time since 1969. The concerts were well received, but the musical and lifestyle differences of Collins, Wallace, and Burrell began to alienate the drug-free Fripp, who began to withdraw socially from his bandmates, creating further tension. In 1971, the new King Crimson formation recorded Islands. Loosely influenced by Miles Davis's orchestral collaborations with Gil Evans and Homer's Odyssey, the album also showed signs of a split in styles between Sinfield (who favoured the softer and more textural jazz-folk approach and wanted the band to move in a Miles Davis direction) and Fripp (who was drawn more towards the harsher instrumental style exemplified by the instrumental "Sailor's Tale", with its dramatic Mellotron and banjo-inspired guitar technique). Islands also featured the band's one-and-only experiment with a string ensemble on "Prelude: Song of the Gulls" and the raunchy rhythm-and-blues-inspired "Ladies of the Road". A hint of trouble to come came when one member of the band allegedly described the more delicate and meditative parts of Islands as "airy-fairy shit". Released in December 1971, Islands charted at No. 30 in the UK and No. 76 in the US. Following a period of touring Islands, Fripp asked Sinfield to leave the band, citing musical differences and a loss of faith in his partner's ideas. The remaining band broke up acrimoniously in rehearsals shortly afterward, owing to Fripp's refusal to incorporate other members' compositions into the band's repertoire. He later cited this as "quality control", with the idea that King Crimson would perform the "right kind" of music. King Crimson reformed to fulfil touring commitments in 1972, with the intention of disbanding afterwards. Recordings from various North American dates between January and February 1972 were released as Earthbound in June 1972, noted and criticised for its sub-par sound quality and playing style that occasionally veered towards funk, with scat singing on the improvised pieces. By this time, a definite musical rift between Fripp and the rest of the band existed, since Wallace, Burrell and Collins favoured a more rhythm-and-blues style. Though personal relations improved during the 1972 tour (to the point where most of the band wished to continue), Fripp opted to part company with the existing band and to restructure King Crimson with new members, since he felt the current members wouldn't be able to play the new material he had in mind.
Answer this question using a quote from the text above:

Did they record any other albums during that time?

Answer:
since he felt the current members wouldn't be able to play the new material he had in mind.