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The growing momentum for tighter gun control after the deadly school shooting in Parkland, Fla., is highlighting the National Rifle Association's history of aggressively confronting challenges to what it regards as Second Amendment rights.

Federal limits on both research into gun violence and the release of data about guns used in crimes are powerful reminders of the lobbying group's advantages over gun control activists. For decades, the NRA pushed legislation that stifled the study and spread of information about the causes of gun violence.

Consider this list of names for hamburgers that are now, or have been, on the market: Thickburger, Whopper, Big Mac, Big Boy, Chubby Boy, Beefy Boy, Super Boy.

Notice a pattern there?

Writer Carol J. Adams does. This list comes from her book Burger, published last month. As the hamburger business gradually grew over time, Adams explains, so did the size of the hamburger — and the gender associations.

The U.S. Department of Agriculture has decided that organic food companies can keep using an emulsifier called carrageenan in foods like ice cream and high-protein drinks, despite a vote by an influential organic advisory committee to ban the ingredient.

When people send away samples for DNA testing they're often hoping the results can help them trace the lineage of their families over centuries and across continents. But when Kelli Rowlette received her results from Ancestry.com she discovered a much closer connection — about 500 miles away from where she lives — dating back to May 20, 1981. Her own birthday.

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