Using Radioactive Radium To Better Understand Yellowstone’s Hydrothermal System
![](https://www.nationalparkstraveler.org/sites/default/files/styles/npt_square2/public/article-teaser-images/144bf6a5aab6403e5df099d38bdf323c-600x486.jpg?itok=9vmmB4l-)
Hydrothermal waters in Yellowstone National Park carry radium to the Earth's surface, but not in quantities harmful to visitors.
- By NPT Staff - May 28th, 2024 1:02pm