Ashley Ahearn
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Scientists are worried about the elusive members of the weasel family that live in parts of Olympic National Forest in Washington state. To see whether martens are endangered, volunteers are installing remote camera traps to take photos of the animals.
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The U.S. Navy is in the process of renewing its permits to conduct sonar and explosive tests off the coast of the Pacific Northwest. But the recent unexplained death of a young orca who washed ashore in February has thrown a wrench in the process. Experts say injuries to the whale may indicate she was exposed to an underwater explosion or sonar testing.
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Scientists with the National Oceanic and Atmospheric Administration are working to prevent outbreaks by tracking when and where red tide in Puget Sound will happen next.