But each year there are some surprises where tornadoes develop when they are least expected.

VOA: special.2010.05.11

But each weed plant can produce tens or even hundreds of thousands of seeds.

VOA: special.2009.05.26

But each time, Mr. Fulton was able to talk his way across the border.

VOA: special.2009.01.14

But each day, they set another record for surviving in space.

VOA: special.2009.06.24

The gold medals are mostly silver. But each is plated with six grams of gold.

VOA: standard.2010.02.16

The army estimates more than 100,000 civilians are still trapped in the conflict zone, but each time the curfew is lifted the Taliban take advantage of the lull in fighting.

VOA: standard.2009.05.12

But the economy was in ruins, falling faster with each passing day of the crisis that grew into the Great Depression.

VOA: special.2011.03.10

But if a woman does miss a payment, the nineteen other women in each loan group help to repay the money.

VOA: special.2010.06.16

But professors at big schools say there is not enough time to write evaluations for each student in large classes.

VOA: special.2009.03.05

But,the Internet is really a network of networks which exchange traffic all the time and compete with each other.

VOA: special.2010.08.20

But Chad Reissig says scientists do not know a lot about them and how they interact with each other and caffeine.

VOA: special.2009.07.22

But Michael O'Donnell says the number of serious bird strike incidents has remained at or below two hundred each year.

VOA: special.2009.04.01

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

States did require each town to provide a school for children, but teachers often were poorly prepared.

VOA: special.2010.06.27