Grade 3

From the central mountains and valleys to the rain forests of La Mosquitia, Honduras is a land of natural beauty. Not every wonder in the country is nature-made, however. The Copán Ruins in… More →

The polar bear is the largest meat-eater living on land. It has an appetite for seals, walruses, and whales, but it is not picky when starving. Come face-to-face with a hungry polar bear and… More →

If emotionless monotones are all that come to mind when you think of robots, it’s time to rewire your motherboard. Open this book and let the renegade robots within inspire you to build your… More →

With fossils as their only clues, scientists have created an image of life millions of years ago. Try your hand at a scene in the world of the dinosaurs with the help of this how-to-draw… More →

When it comes to lemurs, it's a woman's world. Females rule—they eat first, win all family arguments, and fight enemies on the front lines. Learn why you'd want to be “one of the ladies” in a More →

Don't say you weren't warned. Black widows have red markings that let you know they are dangerous. Bother a black widow and experience the effects of its potent poison. Get caught up in… More →

Two sections of Earth’s crust meet to form the Great Rift Valley in the middle of Ethiopia. Bordering the valley are some of Africa’s most expansive highland areas, lending Ethiopia the… More →

Sunshine, solid ground, and fresh air. You don't find these things in underground coal mines. Miners must be prepared to work in pitch-black darkness and survive explosions, cave-ins, and the More →

Black mambas give snakes a bad name. They are aggressive and have a bite that is usually a death sentence. Their venom is 10 to 15 times stronger than a rattlesnake's! Tread carefully as you… More →

With Earth a mere spec in the universe, there’s no telling what life forms exist beyond our blue and green planet. Are there hunter-gatherers with blue tinted skin, or armored warriors no… More →

Does driving a 100,000-pound truck across frozen water sound like a smart idea? No, but some people make their living doing this. Ride along with ice road truckers and discover the unique… More →

The Air Commandos help manage chaos for the U.S. military. They are skilled at pararescue and seizing airfields. Any time, any place, Air Commandos will be there. Follow Air Force Air… More →