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Earth-observing satellites capture smoke plumes sweeping through India.

Until recent decades, researchers could be confident that their numerous studies about permafrost told the tale about this frozen phenomenon.

Elevated greenhouse gas levels and human activity - such as burning forests to clear land - have caused a decline of moisture in the air over the Amazon.

New genetic research has identified fin whales in the northern Pacific Ocean as a separate subspecies, reflecting a revolution in marine mammal taxonomy as scientists unravel the genetics of enormous animals otherwise too large to fit into laboratories.

Satellite imagery reveals how certain parts of Amazon were more resilient to fires.