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Reporting in Nature Medicine, researchers write that a chemical in red meat, L-carnitine, may up the risk of heart disease in people and mice--but only in frequent red-meat eaters. Study author Stanley Hazen of the Cleveland Clinic explains how diet changes the gut's bacterial flora, and how that can affect heart health.

Brewing coffee is a neverending science project, according to barista Sam Penix, owner of Everyman Espresso in New York City. Grind-size, brew method, coffee beans (which are really seeds), water temperature can all affect the flavors that end up in your cup. Harold McGee, author of On Food and Cooking, explains some of the chemistry of coffee.

The Russian president says the part of the money will go to complete a new launch facility under construction in the country's far east.

Mattel says its "Barbie Dolls of the World" typically come with a passport and "animal friend." It's had to respond to some criticism from this week from some who say the Barbie Mexico doll plays into stereotypes.

In Who Could That Be at This Hour?, a prequel to A Series of Unfortunate Events, Daniel Handler satirizes pulp mysteries and uncovers the parallels between detective fiction and childhood. In both, he says, an outsider is trying to make his way in a mysteriously corrupt world.

Infections with a new flu strain have increased, with three to five cases reported daily. The virus, carried by birds, doesn't appear to spread between people. Still, health officials in the U.S. are preparing to screen travelers and develop a vaccine.

In many states the deadlines for companies to file their insurance for sale on new exchanges aren't until late May. Some states with early deadlines have no plans to disclose the rates anytime soon.

The couple paid an effective tax rate of about 18 percent. Vice President Joe Biden and his wife made $385,000 and paid $87,851 in taxes.

Amid tense talk about renovating Wrigley Field, the grisly delivery has inspired talk of curses and threats in Chicago. When the head arrived, politicos immediately suspected the rough-and-tumble mayor. But his spokesman said Rahm Emanuel only sends dead fish.

Tallchief was choreographer George Balanchine's muse and a crucial part of the rise of the New York City Ballet.