If you visit the western mountain and plains state of Montana you will know why it is known as Big Sky Country.

VOA: special.2009.08.16

Today we get to know more about a famous creature known for its pale skin, pointy teeth and big hunger for human blood.

VOA: special.2010.01.20

Romulo Veloso wants to know about the imaginary man known as "Uncle Sam."

VOA: special.2009.09.25

A navigator needs to know what time it is on his ship and also the time at another place of known longitude -- at the very same moment.

VOA: special.2010.07.14

The doctors wanted to know how this could be known.

VOA: special.2009.12.15