Aliev et al. (from Baughman lab at UT Dallas) reported artificial muscles from carbon nanotubes. When applied voltage (5 kV), carbon nanotubes expanded in the same direction (see Figure). What's even more exciting is that they observed almost no change when they swinged at temperatures between 80 K and 1500 K! And the tubes are found to diffract light in a certain direction, opening up optical applications. Cool stuff.