Engineers are building the first bridge over a moving rock glacier
In Denali National Park, Alaska, a major road has been rapidly slipping down a mountain as the permafrost melts. Now, a huge project to build a bridge over the Pretty Rocks landslide has begun
![Engineers are building the first bridge over a moving rock glacier](https://images.newscientist.com/wp-content/uploads/2023/08/31163900/SEI_169403609.jpg)
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