@article{PhysRevFocus.7.31,
  title = {Swirling Sand Mimics Liquid and Gas},
  author = {Brumfiel, Geoff},
  journal = {Phys. Rev. Focus},
  volume = {7},
  issue = {},
  pages = {31},
  numpages = {1},
  year = {2001},
  month = {Jun},
  doi = {10.1103/PhysRevFocus.7.31},
  url = {http://link.aps.org/doi/10.1103/PhysRevFocus.7.31},
  publisher = {American Physical Society}
}