The disagreement about the wings adds attention to a larger dispute. That argument is whether or not birds came from dinosaurs, as most experts agree. But others are like Larry Martin, a University of Kansas member of the research team. He says dinosaurs probably could not get off the ground to fly.
He and other experts believe that birds developed from creatures that were not dinosaurs. They believe ancestors of birds came from animals that lived in trees.
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New Treatment for Rheumatoid Arthritis
BARBARA KLEIN: People who suffer from rheumatoid arthritis experience such pain in their joints that even a simple daily activity can be difficult. A new drug is showing signs of halting the disorder and even un-doing its damaging effects.
One in every one hundred people suffers from rheumatoid arthritis. Women are three times more likely to be affected than men. The exact cause of the disorder is unknown. But researchers are examining the body’s autoimmune system. In patients, the body’s natural defenses against disease seem to attack the person they are supposed to protect.
BOB DOUGHTY: Harris Perlman is an associate professor at the Feinberg School of Medicine at Northwestern University in Illinois.
HARRIS PERLMAN: “What happens is your immune response goes haywire and then your body starts to attack itself, so there’s a failure to shutdown. And how the cells shutdown is they actually die…”
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2013-11-25
2013-11-25
2013-11-25
2013-11-25
2013-11-25
2013-11-25