Overview
- Tourists captured viral photos and videos on June 21 of a bison thrashing before falling into the Grand Prismatic Spring.
- U.S. Geological Survey scientists confirm surface temperatures near 192 °F and deeper water reaching boiling point under its thin crust.
- Officials say the carcass will remain in place to decompose naturally while rangers watch for scavengers that could threaten visitors.
- Experts note that fragile thermal crusts can collapse without warning, leading to occasional wildlife fatalities across Yellowstone’s geothermal areas.
- The National Park Service has renewed warnings for visitors to stay on boardwalks and marked trails to avoid serious injury or death.