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There’s a better-than-random chance that babies born in the United States last year, 2010, were named "Bella" or "Edward. " Those were among the 10 most popular girls’ and boys’ names, respectively, and it was more than a coincidence that they are also leading characters in the wildly popular "Twilight" series of young adult novels and films about vampires. Certain ones which were popular in the 1980s, become the rage, then fall from fashion.

For decades scientists have been following penguins by putting bands around their flippers. This allows individual birds to be identified at a distance. But there have been concerns that flipper bands might be unethical because they harm the birds by slowing them down as they swim. The latest study reported birds fitted with bands died younger, started breeding later in the year, took longer to forage for food and over all raised about 40 percent fewer chicks. There are also concerns that some data gathered on penguins down the years may now be worthless.