Testing reindeer hearing, a river runs under Antarctica, saving sharks with electricity and cougars and grizzlies return to Manitoba
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Description
Figuring out what reindeer can hear to understand the impact from industrial sounds; Scientists discover massive river flowing under the Antarctic Ice; A shocking solution to accidental killing of sharks in fisheries; Clawing back: How cougars and grizzlies are reintroducing themselves in Manitoba,
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