Grades 2 - 5
Which tree weighs as much as 450 elephants and is the heaviest living thing on Earth? How can a tree have bark on its trunk that grows in rainbow colors? What is the strange red liquid that… More →
Beneath our feet extreme pressure and heat inside Earth's crust is constantly forming new, super-hard rock. Inside this book, readers will find a clear, accessible, step-by-step explanation… More →
Special forces operators are trained to do it all. These brave soldiers go behind enemy lines to train allies, gather intelligence, and carry out quick strikes. Find out how these amazing… More →
Animal control officers are ready for any situation that comes their way. From handling dangerous wild animals to rescuing ones in distress, animal control officers must stay calm in the face More →
Which mountain is more than 5 miles high? How was the mile-deep Grand Canyon formed? Where in the world can you visit a giant rock that's taller than the Chrysler Building or an entire city… More →
It's a stormy summer evening and rain is beating down in the desert. A slow-moving animal appears from its underground burrow. The desert tortoise has not drunk any water for nearly a year.… More →
It's a warm spring morning in the desert. A large pink and black lizard crawls slowly from its burrow. The hungry reptile is leaving its underground home to search for a meal of eggs. If the… More →
Stay low and get out fast! Most people know this tactic to safely escape fires from a young age. But firefighters must do the opposite. These heroic men and women extinguish fires and rescue… More →
The town of Gettysburg, Pennsylvania, was the site of the bloodiest battle of the American Civil War. Since then, it has been the location of countless ghost stories. From ghostly children at More →
There’s a lot of risk involved when your job is to keep the peace. From arresting criminals to directing traffic, police officers must be ready to face anything—even if they’re off duty!… More →