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Different lineages of cat with the same coloration got their looks in unique ways. The genetic variants that determine those patterns come from different mutations in the same genes. And that has some scientists thinking there may be more to the genes than meets the eye.

When it comes to trade between China and the US, this one complaint comes up a lot. Some people say China is rigging the game in favor of their exports.

The practice is widespread in Washington, but the Times said it wants to draw a "clear line."

The nonprofit in charge of distributing organs wants to revamp the system for distributing kidneys for the first time in 25 years. But some transplant specialists and bioethicists fear the changes could end up discriminating against some patients.

Mitt Romney's campaign is calling President Obama a redistributionist as a way to change the "47 percent" discussion. But in fact, taking from some and giving to others is a concept long enshrined in the nation's tax code.

Recent anti-American protests in the Middle East have stoked debate over what the U.S. role in the region should be. The Obama administration says the U.S. will continue to engage with new political movements in the region. Some argue for more concrete goals.

The firms, the report says, used aggressive international tax maneuvers to avoid taxes. But it's all legal.

Former four-term GOP Gov. Tommy Thompson is facing off against seven-term Democratic Rep. Tammy Baldwin for an open Senate seat. With recent polls showing a Baldwin surge, one pollster says his state seems to be in the midst of an identity crisis.

The Swedish team transplanted uteruses from two women in their 50s to their daughters, and an Indiana group is recruiting women willing to undergo womb transplants in this country. It's the latest frontier in a field launched in 1954 with a successful kidney transplant. But one expert cautions against premature enthusiasm.

In the coming weeks, candidates will bombard your mailboxes with ads. It may seem old-fashioned, but the consultants who devise direct-mail campaigns have become sophisticated about knowing whom to reach and what to say.