“No, this isn’t a witches’ brew! These swirls are blue-green algae, or cyanobacteria.” The photo was captured Oct. 8 by the Landsat 9 satellite, the agency said. “The lake experiences ...

Pyramid Lake in northeast Nevada developed intense eerie green swirls that could be seen from space. The 125,000-acre Pyramid Lake develops an algal bloom almost yearly, but 2024 has turned into ...