A minke whale photographed in Antarctica last year. The minke, smallest of the baleen whales, turned out to be the mysterious "bio-duck." Tony Beck/Barcroft Media/Barcroft Media/Landov hide caption

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The Two-Way

Scientists Pinpoint Source Of Antarctic 'Quack'

For decades, a mysterious quacking "bio-duck" has been heard roaming the waters of the Southern Ocean. Now scientists say the source is a whale.

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Packs of whale meat are seen in a specialty store in Tokyo last week. An international court ruled Monday that Japan must stop issuing permits to hunt whales in the Antarctic. Shizuo Kambayashi/AP hide caption

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The fossilized remains of a whale that washed up on a shore in what's now Chile more than 5 million years ago. Vince Rossi/Smithsonian Institution hide caption

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Those are two whales coming up from the water, just feet away from two divers off the coast of central California. The image is from a video, which has gone viral, taken on Saturday. YouTube.com hide caption

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A Sandhill Crane flies in at sunset to roost for the night in the wetlands of the Monte Vista Wildlife Refuge in Colorado. Migrating along the same route they've followed for thousands of years, about 25,000 Greater Sandhill Cranes pass through the San Luis Valley in late winter every year. Doug Pensinger/Getty Images hide caption

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