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|  | | Brilliant Bloom in the Baltic Sea
An explosion in the numbers of cyanobacteria transformed the Baltic Sea into a swirling canvas of green in summer 2025. | |
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|  | | Whirling Dust and Ancient Floods
Now a flat and dusty desert playa, Oregon's Alvord Desert once held an expansive lake that was the source of catastrophic outburst flooding. | |
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|  | | Arizona's Declining Groundwater
Decades of satellite observations show that the aquifers in the southern part of the state are ailing. | |
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|  | | Italy’s Majestic Mount Etna
The volcano’s long history of eruptions has influenced eastern Sicily’s physical topography as well as how people interact with the land. | |
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|  | | Rare Snowfall in the Atacama Desert
Snow infrequently falls in the high plains of northern Chile. And when it does, it doesn't last for long. | |
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|  | | Cloud Streets Over the Laptev Sea
The striking cloud formation developed over Arctic waters north of Siberia in July 2025 as frigid air met warmer open water. | |
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|  | | Wildfire Smoke Billows Over Northern California
Amid scorching heat and low humidity, the Green and Butler fires have burned tens of thousands of acres and choked nearby communities with smoke. | |
