Do you know why we yawn when we are bored, how much your liver weighs, or how much mucus your nose produces? Discover how your different body parts work and why it's important to take care of your body.

Reveals the secret life hiding in a backyard, including whats lurking in the ground, what spins a home inside its body, and what creature can carry over ten times its body weight.

Learn all about how people survive living in some of the most extreme places on the planet. Discover which place is the hottest on Earth, which place has had no rain for 400 years, and which city is the most polluted.

Live life in true ancient Greek style with these activities: cook up a storm with ancient Greek recipes, make your own amazing Greek pottery, turn into a Greek hero with your own victory wreath. Live like the ancient Greeks by recreating their food, clothing, and important symbols.

This book will give you the answers to everything you really want to know about how your body works. Find out how your ears stop you from falling over, why you need to blink, and what really makes you sweat.

Ever had an idea that you thought could change the world? Thomas Edison lit up the world. The Wright Brothers helped us fly around it. Tim Berners-Lee helped us all communicate in cyberspace. Discover the amazing brains behind the inventions we could not live without!

Introduces the Lewis and Clark Expedition and its accomplishments, and describes their equipment and gear, the people involved and the ones they met, the hardships they overcame, and the sights they saw in the American West between 1804 and 1806.

Have you got what it takes to be a Roman soldier? Find out what is involved in fighting battles for one of the greatest empires of all time! This book will teach you what to do if you lose your sword in battle, how to attack a fort, and how to choose a position for your camp.