However,much of what we know today about the Grand Canyon was recorded by John Wesley Powell.

VOA: special.2009.10.07

From what we know about a man like Murlock, we may try to imagine some of the details of the story told by my grandfather.

VOA: special.2009.10.31

"What we know is more than That is the cost already and also a lot of demand coming from central banks.

VOA: standard.2010.07.21

"What we know from research on teen brain development, is that teens don't really have fully developed brains until they're 25 years old."

VOA: standard.2010.06.24

"Based on what we know now, we believe that the benefits of bisphosphonates outweigh potential risks."

VOA: standard.2010.03.14

"We can accelerate the seasonal flu vaccine, which we are doing right now to be prepared for what we know will hit this fall and winter.

VOA: standard.2009.05.03

"Well,there are three basic paths they can go through. The first one is the Standard Model, which is basically the theory of what we know now.

VOA: standard.2010.03.05

Sergeant Perry Osburn put it this way: "We cannot let this make us afraid, you know what I'm saying?

VOA: special.2009.11.14

We want to know what you have to say about the effects of the Internet on language and writing.

VOA: special.2010.01.28

"Of course,we don't know what doses they've received, but the only persons at risk of acute radiation effects are the workers."

VOA: special.2011.03.16

Another is that we do not necessarily know what drives us to do the things we do.

VOA: special.2010.04.13

We leave you with "I Don't Know What To Do" from Pete Yorn and Scarlett Johansson.

VOA: special.2009.10.09

Since he's in the Senate and we don't know what's going to happen with the health care bill, he may not even be home.

VOA: special.2009.12.28

One writer says part of the joy in studying her is what we cannot know.

VOA: special.2010.07.18