Permafrost alone holds back Arctic rivers—and a lot of carbon

New research from Dartmouth College provides the first evidence that the Arctic's frozen soil is the dominant force shaping Earth's northernmost rivers. Permafrost, the thick layer of soil that stays frozen for two or more ...

Listening in on endangered Amazon River dolphins

Monitoring echolocation clicks could be used to track the movements of two endangered freshwater dolphin species that inhabit inaccessible parts of the Amazon Basin—the boto (or pink river dolphin) and the tucuxi—and ...

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