Who knows? And that's a different type of search. I'm trying to urge the SETI community to change their tactics a bit."

VOA: standard.2010.04.16

And when you leave,you know, who knows what happens to it.

VOA: standard.2010.08.09

But anyone who has ever lived in Chicago knows how cold that wind can be in winter.

VOA: special.2010.01.10

Experts say one of the reasons the gunfight is so interesting to many people is that no one knows who shot first or why.

VOA: special.2010.02.15

That means the song is so old, no one really knows who wrote it.

VOA: special.2009.07.27

No one knows for sure who gave it this name in the eighteen thirties.

VOA: special.2010.03.21

Anyone who has studied American history knows that the United States is a democracy.

VOA: special.2009.12.14

No one knows who first told stories about Pecos Bill.

VOA: special.2009.11.28

No one knows who put the kitten there or why.

VOA: special.2009.02.23

(Speaking) Mayor Bandic says Croatia needs an independent candidate like himself who,he says, knows the life of ordinary people.

VOA: standard.2009.12.28

"So if you get an audience of 10 million people there's a lot of 'don't knows' who watch you and what you say, what you do,in those 90 minutes could be quite decisive."

VOA: standard.2010.04.23