"Life on Mars?", also known as "(Is There) Life on Mars?", is a song by David Bowie, first released in 1971 on the album Hunky Dory and also released as a single. The song, with piano by Rick Wakeman, has been described by BBC Radio 2 as "a cross between a Broadway musical and a Salvador Dalí painting." When released as a single in 1973, it reached number three in the UK and stayed on the chart for thirteen weeks.

In 2015 Neil McCormick, chief rock music critic of The Daily Telegraph, ranked it as number one in his "100 Greatest Songs of All Time" list. In 2016, Pitchfork named it the best song of the 1970s.

In 1968, Bowie wrote the lyrics "Even a Fool Learns to Love", set to the music of a 1967 French song "Comme d'habitude", composed by Claude François and Jacques Revaux. Bowie's version was never released, but Paul Anka bought the rights to the original French version and rewrote it into "My Way", the song made famous by Frank Sinatra in a 1969 recording on his album of the same name. The success of the Anka version prompted Bowie to write "Life on Mars?" as a parody of Sinatra's recording. In notes for iSelect, a compilation that accompanied a June 2008 issue of The Mail on Sunday, Bowie described how he wrote the song:

Workspace was a big empty room with a chaise longue; a bargain-price art nouveau screen ("William Morris," so I told anyone who asked); a huge overflowing freestanding ashtray and a grand piano. Little else. I started working it out on the piano and had the whole lyric and melody finished by late afternoon.

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