@misc{indiciaeca1f63ce9423,
  title = {Hiking underground.},
  author = {Marguerite Holloway},
  year = {2004},
  doi = {10.1038/scientificamerican0904-112},
  url = {https://pubmed.ncbi.nlm.nih.gov/15376762/},
  note = {Source identifier: 15376762}
}