Winds blowing across the Kuril Islands, between northern Japan and Russia’s Kamchatka Peninsula, sent clouds spinning into compact coils and sprawling swirls on a spring day in 2025. The MODIS (Moderate Resolution Imaging Spectroradiometer) on NASA’s Aqua satellite captured this image of the vortices on April 14, 2025.

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New laboratory research shows that when viruses attack a species that forms toxic algal blooms, those thick, blue-green slicks that choke waterways and that threaten ecosystems, drinking water, and public health, what results might be even worse than before the infection.

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