But here is something that scientists now know: A team led by Professor Fu has reported the first genetic link to how much sleep we need.

VOA: special.2009.08.26

Now,we admit that we do not know how this expression developed.

VOA: special.2009.06.28

"We need an army of people who are equipped to know how to work at all levels and all scales, from protecting animals in the wild to providing shelter to them in zoological parks if necessary."

VOA: special.2010.06.22

So instead of watching bullying take place or joining in with the bullying, these programs teach bystanders how to stand up and be supportive of the kids who are being victimized and to say 'You know we don't do that here, we don't engage in those behaviors.'" Professor Swearer advises parents and teachers to try to get children to talk to them about being bullied.

VOA: special.2010.05.06

We are worried because we do not know how long they will stay or how we will take care of them.

VOA: standard.2009.10.27

There's another path by which they can learn about accelerators and particle detectors essentially, how do we know any of this.

VOA: standard.2010.03.05

We don't know how much the Israelis have produced etc.etc. So we don't have an accurate gauge."

VOA: standard.2010.04.06

When I used to know you so well Yeah, yeah, yeah How did we get here?

VOA: standard.other

We've worked on 10 or 12 floats, so we know basically how to go about this,".

VOA: standard.2009.12.30

We did not know how quickly it was going to move. flu, you cannot catch up.

VOA: standard.2009.05.03

Well, I think I know how Do you see what we've done We're gonna make such fools of ourselves How did we get here?

VOA: standard.other

About 4,000 - year-old corals? We don't know how much oil is down there."

VOA: standard.2010.06.08

"Before we not that smart. Now we know what going on, how much they cheat us, how much they want us to be slave for them."

VOA: standard.2010.05.14

When I used to know you so well YeahBut how did we get here?

VOA: standard.other