“Virus,” the latest single from Björk’s forthcoming album, Biophilia, is today’s Top Tune at KCRW in Los Angeles. “While Björk puts the finishing touches on Biophilia, her most ambitious release to date—a multi-media project that will include an app for each song, a documentary film, a website and unique instruments commissioned for her live shows,” says KCRW, “we're excited to hear how she'll explore the relationships between music and natural phenomena.” Listen to “Virus” and download the track for free today at kcrw.com.

“Virus” is also the latest special feature on the Biophilia App for iPad, iPhone, and iPod touch, available through In-App Purchase via the iTunes App Store. The “Virus” song and app feature explores the relationship between biological virus as part musical instrument, part sonic artwork, and part scientifically informed educational animation. The app feature may be played in song-mode to watch the life cycle of a virus or played in instrument-mode to create music. In “Virus,” infectious agents attack a central cell. Biological and musical processes unite as with each stage of the virus’s life cycle a new song section is heard. The app feature starts with a large cell surrounded by others floating on screen. Small viruses appear, latch on to the cell, and inject their DNA. The strands amass and penetrate the large cell’s nucleus, then the viruses replicate. The song is complete once the cell is destroyed. The user may watch the animation of the song to see and hear the viruses multiply or touch the viruses, flick the nuclei in the cells, play sounds from the song and create original music. To download the Biophilia App, go to the App Store now.

The Biophilia album is available for pre-order in North America in the Nonesuch Store. It is already receiving critical acclaim in early reviews from the UK, where the album will be released on One Little Indian. Uncut, MOJO, and Q all give Biophilia four stars.

MOJO's Victoria Segal says: "Björk's vision remains remarkable." Uncut's Neil Spencer says that "since 1993's Debut, Iceland's most famous citizen has repeatedly stretched pop's boundaries." This proves no less so with the “compelling” Biophilia.

Q reviewer Dorian Lynskey says "Biophilia feels more at ease with itself than any Björk album since 2001's cocoonish Vespertine" and finds that "Virus," in particular, "harks back to the lavish frost-sparkle beauty" of that album. The magazine also features the track on its October list of "Q50 Essential Tracks." Lynskey concludes: "Biophilia is a wonderful record in the most literal sense: it overflows with wonder."

Read the complete reviews in the magazines' latest issues, available now.