"Vice President Lyndon Johnson has left the hospital in Dallas, but we do not know to where he has proceeded.

VOA: special.2009.08.16

Scientists know that some of the Bristlecone pines in northern California are also more than four thousand years old.

VOA: special.2009.05.12

David Odoviano wants to know about the history of interracial marriages in the United States, especially those between blacks and whites.

VOA: special.2010.09.03

In fact,much of what historians know about the president's time at the house is from stories told by those soldiers.

VOA: special.2010.05.10

It says Paul moves in and out of the woods, so few people ever know that he is there.

VOA: special.2009.01.24

Rudolf found it hard to believe that there was someone in the world who did not know what violin was.

VOA: special.2010.05.08

The interviewer wants to know if the person understands the demands of life as a medical student and doctor in training.

VOA: special.2009.06.02

If we had an honest discussion, both of us would know that the other person's heart is in the right place.

VOA: special.2010.07.11

A listener named Maki would like to know if the test known as the TOEIC is popular in the United States.

VOA: special.2010.02.18

Archeologists know that the ancestors of today's Pueblo Indians lived in the Frijoles Canyon for more than four hundred years.

VOA: special.2010.07.05

Bio-markers help researchers know what is happening in the bodies of people with a disease or medical condition.

VOA: special.2011.08.02

In other words, he would know what the children are doing even when he is not watching them.

VOA: special.2009.09.06

He says international students should know that this can affect them in the future if they try to re-enter the United States.

VOA: special.2009.04.02

Percival Lowell did not know that his eyes played a part in the markings he saw on Mars.

VOA: special.2010.07.11