Mastodon is an American heavy metal band from Atlanta, Georgia, formed in early 2000 and composed of bassist/vocalist Troy Sanders, guitarist/vocalist Brent Hinds, guitarist Bill Kelliher and drummer/vocalist Brann Dailor. Many of their songs features heavy and unique instrumentation with a mix of clean vocals and harsh screams. They have released five full-length albums to date, with their latest album, 2011's The Hunter, debuting at No. 10 on The Billboard 200 chart. Mastodon was formed on January 13th 2000 after drummer Brann Dailor and guitarist Bill Kelliher had moved to Atlanta from Victor, New York and met bassist/singer Troy Sanders and guitarist/singer Brent Hinds at a High on Fire show. They discovered they had a mutual appreciation of sludge metal bands Melvins and Neurosis and '70s hard-rockers Thin Lizzy, and shortly thereafter formed Mastodon.