高湿和低温改变了COVID-19在巴西的传播，但影响不大。
satellite imagery
Posted inNews
As the Arctic Warms, These Rivers Are Slowing Down
The Arctic is warming up, but instead of large rivers migrating faster, they’re actually slowing down because of shrubification.
Posted inResearch Spotlights
Neural Networks Map the Ebb and Flow of Tiny Ponds
Ponds play an outsized role in carbon emissions, but their size makes them hard to track. Enter machine learning.
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Newly Discovered Salts May Exist on Icy Moons
For the first time in more than a century, scientists have identified new sodium chloride crystals. The discovery may reconcile puzzling spectroscopic images of Europa’s surface.
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Active Volcanoes on Venus?
With a new look at old imagery, scientists may have found evidence of volcanic activity on Venus.
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Las hojas están brotando más temprano en el Sendero de los Apalaches
Imágenes satelitales de nuevas y brillantes hojas revelan cambios que producirán un efecto de cascada en diversos ecosistemas al este de los Estados Unidos.
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Mapping Rwanda’s Trees from Above
Researchers used both aerial and satellite imagery, as well as machine learning, to map the carbon stock of every overstory tree in Rwanda—the first such inventory in the world.
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Scientists EEAGER-ly Track Beavers Across Western United States
Efficiently tracking nature’s engineers—beavers—at the scale of entire watersheds over time is now possible, thanks to a new artificial intelligence–trained model called EEAGER.
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Leaves Are Springing Up Earlier Along the Appalachian Trail
Satellite images of lustrous new leaves reveal changes that will have cascading effects on diverse ecosystems in the eastern United States.
Posted inResearch Spotlights
MESSENGER Reveals a More Dynamic Mercury Surface
Image pairs indicate that 99% of the planet’s surface could be altered in the next 25 million years.