When each eye sees very similar, but different versions of an image, the brain thinks it is seeing depth, or three dimensions.

VOA: special.2010.01.26

This was very different from the communication between two people speaking to each other on a telephone.

VOA: special.2010.01.31

Nevertheless,I forged ahead, and with each step the tunnel grew larger, and I felt as though I was wandering into the very core of the Guadalupe Mountains."

VOA: special.2011.04.11

The soldiers could not see each other until they were very close.

VOA: special.2009.11.26

"I was in college when I came to United States and it was interesting that in America they celebrate people in love and express love to each other, because in China people are very reserved and they do not show appreciation openly.

VOA: special.2010.02.08

They are very productive, have lots of different critters, and they all depend on each other."

VOA: standard.2010.05.09

"Well,to all of us it's very important.." "We have about 2,000 people in attendance each year.

VOA: standard.2010.08.02

"Each species of turtle plays a very vital role in the whole ecosystem functioning."

VOA: standard.2010.07.15

So to be able to get a tree that, first of all,has very clear rings that we're able to visually match to each other and then go through and produce these long records was remarkable."

VOA: standard.2010.04.05