In late June 2025, an ancient city covering several square miles was discovered beneath Wyoming's Horse Peak mountain.

Article citations More>> Brennan, S.T., Burruss, R.C., Merrill, M.D., et al. (2010) A Probabilistic Assessment Methodology for the Evaluation of Geologic Carbon Dioxide Storage. US Geological Survey ...

The U.S. Geological Survey declined to answer questions about the potential impacts of budget cuts on funding to state surveys.