Scientists reported new evidence Wednesday that supports a provocative theory about cancer.
Three separate teams of scientists said they had, for the first time, shown that so-called cancer stem cells can be found naturally in brain tumors and early forms of skin and colon cancer.
Evidence has been mounting in recent years for the existence of these cells, which would be especially insidious. They are believed to resist standard chemotherapy and radiation and fuel the growth of tumors and relapses.
As the presumptive presidential nominee, former Massachusetts Gov. Mitt Romney is currently the face of the Republican Party. But, as journalist Ryan Lizza suggests in his article in this week's New Yorker, the party's agenda and ideology are being driven by a very different figure: Rep. Paul Ryan of Wisconsin.
Originally published on Wed August 8, 2012 11:58 am
This month we are collecting your stories about the good things Americans are doing to make their community a better place. Some of your contributions will become blog posts and the project will end with a story that weaves together submissions to make a story of Americans by Americans for Americans.
I'm Michel Martin and this is TELL ME MORE from NPR News. Later in the program, we'll hear about some important provisions in the health care overhaul bill that go into effect today. Now, a number of these provisions remain controversial but we're going to step aside from the politics for a minute to try to find out what they mean for individuals. That's coming up later in the program.