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The green anaconda is the largest snake in the world, when both weight and length are considered. It can reach a length of 30 feet (9 meters) and weigh up to 550 pounds (227 kilograms). To picture how big that is, if about five ten-year-olds lie down head to foot, they’d be about the length of this huge snake. The green anaconda is a member of a family of snakes called constrictors. Constrictors are not venomous snakes. They don’t kill prey by delivering venom through a bite. Instead, constrictors wrap their bodies around their prey and squeeze until it stops breathing. The giant snake opens its mouth wide enough to swallow its victim—sometimes fish or caiman (relatives of crocodiles) and even jaguars and small deer. Anaconda jaws are held together with stretchy ligaments so they can open wide enough to swallow prey whole. And it’d take about 11 kids to weigh as much as one anaconda.
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Cruz’s Aunt Marisol sends him postcards from around the world with secret messages written in code. Start the scavenger hunt by following the instructions on the first postcard below. See if you can solve Marisol’s codes and unlock a secret about Explorer Academy.
Watch them in action and find out how they’re changing the world through science

Real or Fake? is an awesome game show that’s hitting the streets and asking kids to separate the fact from the fiction. As contestants try to make it through three wild and wacky rounds, only one can be crowned champion. It’s silly. It’s nutty. It’s a little berserk. But if you think you’ve got what it takes, then put your smarts to the ultimate test as you answer the question: Is it REAL or is it FAKE?!
battleground and we try to find the smartest kid on this block!

Picture a camel. Now take away a hump (or two). Finally, shrink it down in size and place it in South America, living as far south as Tierra del Fuego. What do you end up with? A guanaco. Guanacos are related to camels, as are vicunas, llamas, and alpacas. But they live in South America, while camels are found in Africa and Asia. Guanacos and vicunas are wild animals, but llamas and alpacas have been domesticated, like cats and dogs, and were probably bred from guanacos. They’re slender animals with pale brown backs, white undersides, short tails, large heads, very long necks, and big, pointed ears. They live in groups of up to ten females, their young, and a dominant male adult. Unattached bachelor males form herds of their own—these can include as many as 50 or more animals. When a female guanaco gives birth, her newborn, known as a chulengo, is able to walk immediately. Chulengos can keep up with the herd right away. Guanacos live on land high in the Andes mountains—up to 13,000 feet (3,962 meters) above sea level—as well as on the lower plateaus, plains, and coastlines of Peru, Chile, and Argentina. Guanacos were once over hunted for their thick, warm wool. Now they thrive in areas protected by law.
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The instruments you’ll need to build your own weather station
explore more How Things Work Kamri Noel and four of National Geographic’s experts find

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Find out how you can make your own bouncy egg in this „Try This!“

Koalas are marsupials, related to kangaroos.
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Harp seals spend most of their time diving and swimming in the icy waters of the North Atlantic and Arctic Oceans. These sleek swimmers often hunt for fish and crustaceans at 300 feet (90 meters) and may dive to nearly 1,000 feet (300 meters). They are able to remain submerged for up to 15 minutes. During mating season, females form large colonies on floating ice and give birth to young. Older seals return annually to pack ice to molt. They lose their pelts and top layers of skin and grow a new fur coat every year. Harp seals are sometimes called saddleback seals because of the dark, saddlelike marking on the back and sides of their light yellow or gray bodies of the adults. Baby seals are born on pack ice floating in the North Atlantic and Arctic Oceans. Harp seal mothers are able to identify their babies by their smell. The pups don’t have any blubber at birth, but quickly gain weight nursing on high-fat mother’s milk. When the pups reach about 80 pounds (36 kilograms), their mothers stop nursing them. The pups go without food for about six weeks and can lose about half their body weight until they dive in and begin to hunt for themselves. The young seals are famous for their snowy white coats.
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During the mating season, male blue-footed boobies strut around with exaggerated movements that show off their fabulous blue feet. Females tend to pick the males with the bluest feet as their mates. Parents take care of their chicks feeding and protecting them—until they’re about two months old. At that point, young boobies can survive on their own. Blue-footed boobies sleep at night, generally on land, and feed at sea during the day. Sometimes boobies feed in a group. They often fly far out to sea to look for their prey—small fish such as anchovies. The birds either zip underwater for fish from a floating position on the water’s surface or make awesome dives from as high as 80 feet (24 meters) in the air. Once it spots a school of fish, the bird folds those wings back, becoming a streamlined, torpedo-shaped predator. The booby dives into the water among the school of fish, using its long beak to grab dinner.
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