@misc{indiciaeca0a71f14718,
  title = {Planetary science: being there.},
  author = {Kevin Zahnle},
  year = {2005},
  doi = {10.1038/433814b},
  url = {https://pubmed.ncbi.nlm.nih.gov/15729325/},
  note = {Source identifier: 15729325}
}