That is why scientists today wonder at the depth of his knowledge and the strength of his arguments.

VOA: special.2009.02.25

That's why I must decide on something at once while there is still time, before I am famous.

VOA: special.2009.09.20

But why is that? A study published in two thousand three in the journal Science offered an answer.

VOA: special.2009.06.24

That is why it is hard to tell a powerful storm, Hurricane Andrew, caused severe damage to the area in nineteen ninety-two.

VOA: special.2009.06.30

Plate tectonics is the area of science that explains why the surface of the Earth changes and how those changes cause earthquakes.

VOA: special.2010.01.12

That is why author and illustrator Rosalyn Schanzer chose to write the children's book "What Darwin Saw: The Journey that Changed the World."

VOA: special.2009.02.27

So I put you to the test, that is why I said you owed me 40 dollars.

VOA: special.2010.06.26

And that's why the American Recovery and Reinvestment Plan won't just throw money at our problems.

VOA: special.2009.01.09

That's why I am paying attention more." Jobs have continued to disappear, though at slower rates.

VOA: special.2009.08.21

That's why creating jobs has to be our number one priority in two thousand and ten."

VOA: special.2010.01.30

People can't afford them. That's why we don't really have a malaria vaccine yet, because no one in rich countries really suffers from malaria.

VOA: special.2010.03.29

"And that experience was life changing. And that's why I decided to start a charity."

VOA: special.2009.08.10

That is why the word heart is used in so many expressions about emotional situations.

VOA: special.2010.07.18

Maybe that is why there are so many expressions that use the word cold.

VOA: special.2009.12.13