This is WEEKEND EDITION, from NPR News. I'm David Greene. Americans are growing more and more frustrated with the gridlock in Washington, D.C. In a Gallup poll out this month, only 17 percent of Americans said they approve of the job Congress is doing. Well, Christine Quinn says it does not have to be that way. She is the speaker of the New York City Council, and she's taken heat for seeming too close to the executive branch - that would be New York Mayor Michael Bloomberg.
Human evolution is all about survival of the fittest. Over thousands of generations, the weak have been weeded out, and the strong have survived. But how would that kind of natural selection work in other settings - like, say, music? Well, one biologist decided to find out. He designed a website where listeners can rate collections of notes according to their musicality. The nice sounds survive, and other users listen to them. But the ugly sounds die off.