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Yellowstone Superintendent Superintendent Cam Sholly said part of the park's major northern road will remain closed indefinitely, raising questions about how the park will manage summer crowds.

The park says "unprecedented amounts of rainfall" has caused hazardous conditions, including rock and mudslides and washed out roads and bridges.

Astronaut Megan McArthur grew up visiting national parks like Yosemite, Grand Canyon and Zion. Now she’s photographing them from 250 miles above the surface of Earth.