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Rangers to Leave Bison Carcass in Yellowstone’s Grand Prismatic Spring

Park officials will monitor the bison’s natural decay in the hot spring after deeming removal unsafe under near-boiling conditions on unstable ground.

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A bison walked through the Prismatic Hot Spring at Yellowstone National Park and fell in, the National Park Service said. "An unfortunate example of what can happen by wandering off boardwalk in thermal areas," the National Park Service said.
Yellowstone National Park Bison
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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.