Grade 5

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 →

Recon Marines are sent on high-risk knowledge quests. They travel inside enemy territory to gather intelligence for military leaders. With the top secret information they collect, the U.S.… More →

Everyone knows that mosquitoes are bloodsuckers. But did you know that some can cast the shadow of death with a bite? They spread malaria and life-threatening fevers through their saliva.… 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 →

For missions that need immediate attention, the B-2 stealth bomber takes to the runway. This flying wing can reach any target in the world in a matter of hours. The bomber’s flat frame is… 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 →

Don't touch the deathstalker scorpion! If it doesn't nab you with its pinschers, it will sting you with toxic venom from the end of its tail. Read about the deathstalker before you become its More →

New Zealanders love to play, and their country is their playground. This South Pacific island comes equipped with snowy mountains for skiing, swift rivers for rafting, and deep valleys for… 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 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 →