From planets to animals to sunken treasure, things are discovered every day. This reader shows the ways in which people and explorers can find things they missed - or never even knew were gone! Use the unique code inside the book to access the online reader, complete with videos and interactive exercises. Word count: 2647.

The human brain is an amazing organ controlling our speech, making our heart beat, and solving problems. Come and explore how our brains work and make us who we are. Use the unique code inside the book to access the online reader, complete with videos and interactive exercises. Word count: 2319.

Would you live in space? How about in a cave? Would you mind living below a volcano? Explore the many dangerous and unusual places people can live all over (and outside of!) the world. Use the unique code inside the book to access the online reader, complete with videos and interactive exercises. Word count: 2893.

People can lose battles, money, games, and even themselves. Read extraordinary stories about how loss challenges and changes us, from King Xerxes to the Bermuda Triangle. Use the unique code inside the book to access the online reader, complete with videos and interactive exercises. Word count: 2802.

How do we decide where a country ends and begins? Come examine the ideas of borders and territory, on Earth and beyond. Use the unique code inside the book to access the online reader, complete with videos and interactive exercises. Word count: 2736.

Building a greener world! This reader explores the newest and cleverest ideas in sustainable energy and ecologically friendly construction. Use the unique code inside the book to access the online reader, complete with videos and interactive exercises. Word count: 2573.

There are many secrets to a long and happy life - and being rich and famous isn't one of them. Come explore why friends, love, a positive personality, and the environment are much more important. Use the unique code inside the book to access the online reader, complete with videos and interactive exercises. Word count: 2805.

Venice is one of the most romantic and storied cities in the entire world. Now a popular tourist destination, Venice isn't just about winding canals and gondoliers. This reader examines not only Venice's long and fascinating history, but also its controversial present day. Use the unique code inside the book to access the online reader, complete with videos and interactive exercises. Word count: 2254.

Boomerangs! Catapults! Sword rockets! Bat bombs! Throughout history, people have had no trouble finding ways to harm one another. Discover some of the strangest and most dangerous weapons that people have ever made. Use the unique code inside the book to access the online reader, complete with videos and interactive exercises. Word count: 2539.

Sharks, ghosts, aliens, snakes…cell phones? All kinds of things make people afraid. How does our brain tell us to be afraid, and can we control fear? Use your unique code inside the book to access the online reader, complete with videos and interactive exercises. Word count: 2480.