Grade 4

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 →

When kangaroos gather in large groups, they get loud and physical. Males duke it out in boxing matches, jumping and jabbing with feisty determination to earn the “dominant male” title. Be… 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 →

When United States infantry troops need support, a UH-60 Black Hawk prepares for liftoff. This utility helicopter can carry 11 fully equipped soldiers into battle and transport injured troops More →

Ostriches are birds that can't fly. They take it in stride, sprinting in short bursts instead. When ostriches can't run from danger, they face it head on. Well, with their heads on 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 →

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 →

Sometimes actors don't have the skills they need for a movie scene. This is where stunt performers jump in, sometimes literally. These daredevils jump out of moving cars, off high cliffs, and More →

With a flight deck longer than three football fields, the Nimitz aircraft carrier is the largest warship at sea. The 6,000 crew members and 80 aircraft onboard make each ship a military hub… 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 →

Killer bees have the mob mentality. They attack in large groups and refuse to let up without a fight. A group of killer bees can remain wound up for up to 24 hours! Learn why you should never More →