Grade 4

Do some animals really have the power to kill by zapping their prey with electricity? The shocking answer is yes. And that’s not all that electric animals can do with their super-charged… More →

There are places around the world that seem to be under a dark spell. Mysterious events happen on these grounds, and many visitors report experiencing paranormal activity. These cursed places More →

This ancient country is considered the birthplace of Western civilization. Tourists can walk on the grounds of the first Olympic Games, see the mythical Mount Olympus, and visit the Acropolis More →

During the 19th century, the first cars could barely go 10 miles per hour. Today, cars can go even faster than some planes. How? These cars use the same engines as airplanes—jet engines. In… More →

Haiti is a country that has experienced many hardships—most recently, a devastating earthquake in January of 2010. It is also a country with a rich history and a culture that is famous for… More →

Did you know that a Great Dane named George holds the record for the world’s tallest dog? Great Danes are large, graceful dogs that sometimes work as service dogs, assisting people who need… More →

Great medical triumphs have taken place at hospitals. But are these medical buildings also a great place to go looking for ghosts? According to some, they are. Ghost hunters believe that the… More →

Did you know that Iraq was home to the oldest known human civilization on Earth? This area used to be known as Mesopotamia, and many different ancient peoples lived there. Readers will learn… More →

A medium-lift assault helicopter, CH-46 Sea Knights are used to deliver heavily armed troops into battle. They are also used on several other missions. Readers will learn about these large… More →

Costa Rica, which means “Rich Coast,” is aptly named. Its long coastlines, bordering the Caribbean Sea to the east and the Pacific Ocean to the west, have some of the most diverse ecosystems… More →

Persians are considered one of the oldest cat breeds. They have always been prized for their long, soft fur and beautiful looks. Just take Gizmo, who won Best in Show at the 2009… More →

With huge rear wheels, flip-up bodies, and powerful engines, funny cars thrill fans across the country. Funny car engines can have over forty times the horsepower of a normal production… More →