Mantissa were an Australian hard rock band which formed as Killing Time in 1989. Killing Time included Nina Grant on bass guitar and vocals, Chris Paine on guitar, and Adam Pringle on lead vocals. In February 1991 they issued an extended play, Ruby's Mind, which reached the Top 100 on the ARIA Singles Chart. Their Dream Alone (March 1992) extended play, peaked in the Top 30. Killing Time supported national tours by Jane's Addiction, Mudhoney, Scatterbrain and Baby Animals. In August 1992 Killing Time changed their name to Mantissa and followed with their debut album, Mossy God, in October on Red Eye Records / Polydor Records, which appeared in the Top 50 ARIA Albums Chart. Their second album, Thirst, appeared in August 1995 and the group disbanded in 1996.