Facebook's psychological study ends up testing users' trust

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Many Facebook users were upset by news that the social media network manipulated incoming content for hundreds of thousands of people without telling them. The manipulation was conduction for a study -- published in a respected scientific journal -- measuring how attitudes were affected by either positive or negative posts. Judy Woodruff learns more from Reed Albergotti of The Wall Street Journal.



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RADIATION DIE OFF. Unusual Sea Creatures Turning Up On California Coast.

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LOS ANGELES (AP) — A rare whale that has a dolphin-shaped head and saber-like teeth has been found dead on Los Angeles' Venice Beach, even though it prefers frigid subarctic waters. The roughly 15-foot-long female Stejneger's beaked whale washed ashore Tuesday night, the Los Angeles Times reported . A truck hauled away the mammal, which was being examined at the Los Angeles County Natural History Museum to determine how it died. The Stejneger's beaked whale is rarely seen in the wild. The species typically dives deep in subarctic waters to feed on squid and small fish. It is believed to migrate as far south as Northern California , and how the whale ended up so far south will probably remain a mystery. "This is the best," said Nick Fash, an education specialist for the Santa Monica-based environmental group Heal the Bay. "(Previous finds) aren't anything like this. This is a treat."     Related articles Rare saber-...
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