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Some 20,000 years ago, the Earth wobbled on its axis. That happens periodically. But according to a new scenario, this particular time, that wobble sparked a chain reaction of events that melted glaciers and led to a gradual warming of the planet.

See which committees do the most (and which do the least) to help lawmakers raise money for re-election.

Hospitals trying to eliminate unhealthy food from their cafeterias are finding that uprooting fast food chains isn't easy.

Companies have agreed to create a national database for stolen or missing phones, which would then be deactivated. It's hoped that will make them less tempting.

An Institute of Medicine panel says a tax of half a percent or so on medical transactions could help the nation's public health agencies tackle pressing goals, such as reducing adult obesity. In the long run, that could result in big savings in health care spending, the panel says.

One of the sharpest dividing lines emerging between President Obama and Mitt Romney is the budget introduced in Congress by Rep. Paul Ryan, R-Wis., with its sharp cuts in domestic spending and lower tax rates. The Obama campaign likes to call it the "Romney-Ryan budget." And Romney hasn't objected.

Life for most Haitians is a constant struggle for clean water. And now that cholera has invaded Haiti, safe drinking water has become Haiti's most urgent public health problem. The disease has killed more than 7,000 people since late 2010.

Support for Mitt Romney has surged in Pennsylvania as Rick Santorum's has flagged... Santorum is taking an Easter break from the campaign trail, spurring speculation that he may be considering dropping out... Coca Cola and PepsiCo have dropped their membership in the American Legislative Exchange Council.

Steve Inskeep talks to Christine Brennan, a columnist for USA Today, for a preview of the Masters golf tournament. For the time being, play is being overshadowed by the issue of should women be allowed to join the exclusive all-male club.

The mild New England winter means that more black bears are up and about, looking for food — and not just in the woods. In Northampton, Mass.,they're also exploring urban backyards and residential cul-de-sacs, where finding food scraps is a lot easier than berry-picking.