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Arthritis is a joint disease that can cause cartilage destruction and erosion of the bone, as well as tendon inflammation and rupture. Affected areas are highlighted in red in this enhanced X-ray.

6,000-Year-Old Knee Joints Suggest Osteoarthritis Isn't Just Wear And Tear

Even after a Harvard team took into account differences in age and weight among ancient specimens and knees today, they found that modern humans tend to have more osteoarthritis.

A view of the ancient Citadel in the center of Erbil, in northern Iraq. Built 6,000 years ago, the Citadel may be the oldest continuously inhabited settlement in the world. It's currently undergoing a renovation that's expected to take 25 years.

After 6,000 Years, Time For A Renovation At Iraq's Citadel

The Citadel, at the heart of the Kurdish city of Erbil, has been inhabited for six millennia. Now, amid war and destruction, it's undergoing a much-needed restoration and upgrade of city services.

National Geodetic Survey crew members Roy Anderson, left, and Steve Breidenbach set up survey equipment used to measure the height of the Washington Monument.

How Tall Is The Washington Monument? Surveyors Take To The Top

The last time the monument's height was measured was in 1999. And with scaffolding in place for earthquake repairs, engineers have a rare opportunity to take official measurements of the iconic obelisk.

Mitt Romney Tops Washington Caucuses

The former Massachusetts governor pulled ahead of his rivals in Saturday's presidential straw poll, gaining more momentum just before Super Tuesday. Ron Paul, who edged Rick Santorum for second place, insisted he, too, had reason to celebrate.

President Jacob Zuma arrives at Parliament in Cape Town, South Africa, for the State Of The Nation address in February.

South African President Jacob Zuma Must Pay Up, Top Court Says

The Constitutional Court says Zuma must pay back a portion of the millions spent on a supposed security upgrade to his home. That included an amphitheater, cattle kraal, chicken run and swimming pool.

Double Yolks Found In 6 Consecutive Eggs

In England, a man went to the store and bought a package of six eggs. He cracked the first one open, and found a double yolk. Then he cracked open the second. Two yolks in that one as well. It turns out all six eggs were like that. The chances of that happening:about one in a trillion.

Angelique Kidjo on Africa Mix ~ 6/19/14

Host Emmanuel Nado visits with singer/songwriter, performer, social activist, and panafricanist Angelique Kidjo, one of the most recognizable and…

Demonstrators march toward the U.S. Capitol on Saturday to demand that Congress investigate the National Security Agency's mass surveillance programs.

Top Pollster Sees Evidence Of Political 'Shock Wave'

Just a few weeks ago, pollster Bill McInturff characterized the high negative ratings for Congress and the president as "ripples that will take a long time to resolve." Now, with new polling that suggests even deeper voter frustration, he says the political climate is even worse than before.

Mississippi state Sen. David Jordan, who was a college student in 1955, remembers the relaxed atmosphere in the courtroom during the trial. "Even the jury were laughing," he says.

6 Decades Later, Acquittal Of Emmett Till's Killers Troubles Town

The murder of the 14-year-old black boy and subsequent trial before an all-white jury was an early landmark in the civil rights movement.

Nat'l Caramel Popcorn Day-KALW Almanac-4/6/2016

97th Day of 2016 269 RemainingSummer Begins in 75 DaysSunrise: 6:45Sunset: 7:3812 Hours 53 MinutesMoon Rise: 6:24amMoon Set: 7:03pmPhase: 1% 29 DaysNext…

July 1 brings big student loan changes. Here's what you need to know

A popular (and generous) repayment plan ends, two new plans begin and many borrowers will see new loan limits.

The mystery man was in the tree for more than 24 hours.

After 24 Hours, Man At Top Of 80-Foot Sequoia Tree Climbs Down

A man who climbed an enormous tree in downtown Seattle on Tuesday morning and stayed there overnight repeatedly rebuffed police negotiators before climbing down safely on Wednesday.

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