"Experts often disagree about how much and what kind of intelligence should be considered classified. In addition, there can be benefits to leaking intelligence, a practice that is done by insiders wi
Once they were the stuff of science fiction, but almost out of nowhere, self-driving cars have become a reality. Experts suggest that driverless cars will appear on our roads within five to twenty yea
Metamorphic rocks are the third great type of rock found in the lithosphere. Originally of other types these rocks have been changed mainly by heat and pressure into new forms. This introductory guide
The U.S. constitution was signed over two hundred years ago, and it still protects American citizens today. Using primary sources, young readers hear the story behind this American symbol from the peo
Francis Scott Key wrote the poem that became our country's national anthem in celebration of America's surprise victory over Britain in the War of 1812. It was sung for more than a century before it b
The Pledge of Allegiance was first written more than two hundred years ago to celebrate Columbus Day. Since then, it has grown into a treasured American symbol. Using primary sources, young readers he
The U.S. flag has stood as a symbol of freedom since America was founded. Using primary sources, young readers hear the story behind this treasured symbol from the people who were there. Engaging text
The French came up with the idea of The Statue of Liberty but, in the end, it was paid for by both the Americans and the French. Its torch and the Emma Lazarus poem saying "give us your tired, your po
The Liberty Bell has been a symbol of basic American rights since before the Revolutionary War. It has remained a treasured symbol, prominently used during the height of the civil rights movement and
"How many countries are in North America? Where do bald eagles live? What language is spoken in Mexico? This book answers these questions and more as it introduces young readers to the continent of No
"Where is Mandarin spoken? Where do tigers live? What is the longest river in Asia? This book answers these questions and more as it introduces young readers to the continent of Asia through age-appro
"What is Europe's highest mountain? How many countries are in Europe? What languages do people in Europe speak? This book answers these questions and more as it introduces young readers to the contine
"Where is the Sahara Desert? What is Africa's highest mountain? Where do elephants live? This book answers these questions and more as it introduces young readers to the continent of Africa through ag
"How many countries are in South America? Where is the world's tallest waterfall? How long is the Amazon River? This book answers these questions and more as it introduces young readers to the contine
