Ice, leaves, twigs, even dust--these are some of the things Andy Goldsworthy uses in his artworks. Real icicles are the material of Icicle Star. Goldsworthy created this piece on a rock near where he found the icicles. He thinks of his sculptures as temporary--they are called ephemeral art. Since Goldsworthy knows his artworks won’t last long, he always takes photographs of them.