β-Carotene is a strongly-coloured red-orange pigment abundant in plants and fruits. It is an organic compound and chemically is classified as a hydrocarbon and specifically as a terpenoid (isoprenoid), reflecting its derivation from isoprene units. β-Carotene is biosynthesized from geranylgeranyl pyrophosphate. It is a member of the carotenes, which are tetraterpenes, synthesized biochemically from eight isoprene units and thus having 40 carbons. Among this general class of carotenes, β-Carotene is distinguished by having beta-rings at both ends of the molecule. Absorption of β-Carotene is enhanced if eaten with fats, as carotenes are fat soluble.

Carotene is the substance in carrots that colours them orange and is the most common form of carotene in plants. When used as a food colouring, it has the E number E160a.^p119 The structure was deduced by Karrer et al. in 1930. In nature, β-carotene is a precursor (inactive form) to vitamin A via the action of beta-carotene 15,15'-monooxygenase. Isolation of β-carotene from fruits abundant in carotenoids is commonly done using column chromatography. The separation of β-carotene from the mixture of other carotenoids is based on the polarity of a compound. β-Carotene is a non-polar compound, so it is separated with a non-polar solvent such as hexane. Being highly conjugated, it is deeply colored, and as a hydrocarbon lacking functional groups, it is very lipophilic.

Modest Mouse is an American indie rock band based in Portland, Oregon. They were formed in 1993 in Issaquah, Washington, by singer/lyricist/guitarist Isaac Brock, drummer Jeremiah Green, and bassist Eric Judy. Since their 1996 debut album, This Is a Long Drive for Someone with Nothing to Think About, their lineup has centered around Brock, Green and Judy. Guitarist Johnny Marr (formerly of The Smiths) joined the band in May 2006, along with percussionist Joe Plummer (formerly of the Black Heart Procession) and multi-instrumentalist Tom Peloso, to work on the album We Were Dead Before the Ship Even Sank. Guitarist Jim Fairchild joined the band in February 2009. Their name is derived from a passage from the Virginia Woolf story "The Mark on the Wall" which reads, "I wish I could hit upon a pleasant track of thought, a track indirectly reflecting credit upon myself, for those are the pleasantest thoughts, and very frequent even in the minds of modest, mouse-coloured people, who believe genuinely that they dislike to hear their own praises."