This year's Turner Prize exhibition has been unveiled at the Tate Britain in London. Among the nominees is Roger Hiorns, who melted down a passenger jet engine and sprayed it through nozzles to create a fine dust, which he spread on the gallery floor.
Among Hiorns' other works is Untitled 2009, a stainless steel lattice filled with neatly processed cubes of cow's brain.
A graduate of the Edinburgh College of Art, Richard Wright paints abstract wall drawings. His gold-leaf display took three weeks to install and is described by the Tate as the artist's "most complex and ambitious composition to date".
Glasgow-based artist Lucy Skaer is also in the running for the £25,000 prize. Her Black Alphabet, 2008, is a series of 26 sculptures made from coal dust.
Skaer is also displaying a mixed media installation (left) and Leviathan Edge 2009, the skull of a sperm whale, just visible behind a screen partitioned with peep holes (right).
Enrico David's exhibition includes a parade of bizarre toy-like characters, including papier mache "egg men" with feet which allow them to rock back and forth. The overall winner will be announced during a live Channel 4 broadcast on 7 December.
What are these?