United States

The continental scale of the United States means everything from Hawaiian lava flows to Alaskan aurora to desert superblooms. Each region runs on its own seasonal clock.

101 Total Phenomena
5 Field Notes
Apostle Islands Ice Caves: When Lake Superior Freezes, the Cliffs Come Alive
Geological

Apostle Islands Ice Caves: When Lake Superior Freezes, the Cliffs Come Alive
Bat Emergence at Bracken Cave: 20 Million Wings Darken the Texas Sky
Wildlife

Bat Emergence at Bracken Cave: 20 Million Wings Darken the Texas Sky
California Superbloom: When the Desert Floor Erupts in Millions of Wildflowers
Botanical

California Superbloom: When the Desert Floor Erupts in Millions of Wildflowers
Horsetail Firefall: When Yosemite's Granite Runs with Liquid Light
Optical

Horsetail Firefall: When Yosemite's Granite Runs with Liquid Light
Sandhill Crane Migration on the Platte River: 600,000 Ancient Voices Over Nebraska
Wildlife

Sandhill Crane Migration on the Platte River: 600,000 Ancient Voices Over Nebraska

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