Grade 4

The Wright Brothers famously made the first flight in Kitty Hawk, North Carolina. But the history of human flight goes back much further! This title details the experimentation and innovation More →

A single day is longer than a year on Venus! This hot, rocky planet is much like Earth, but it holds many mysteries that scientists work hard to unravel. How did it form? What is it made of?… More →

Neptune is the outermost planet in the solar system! It may look a calm blue, but this huge planet is swirling with activity. A thick layer of clouds gives way to whirls of rocks and ice.… More →

Guatemala is a nation filled with diversity! People with Maya and Spanish roots as well as other ethnicities bring a rich culture. The land houses black beaches, volcanoes, and highlands as… More →

A beautifully vast landscape and respectful culture fill the country of Cambodia. Despite a history of persecution and danger, Cambodians celebrate their freedom and customs with joy! In this More →

Switzerland is a country of many faces! People from all over the world make this neutral land home. Even though it has four official languages and a diverse population, Switzerland’s culture… More →

In 2006, Pluto was reclassified as a dwarf planet. Small, rocky dwarf planets make their home on the outer edges of the solar system. Scientists use telescopes to study Pluto and the dwarf… More →

Indy cars got their start on a car factory test track. That track went on to become one of the most famous racetracks in the world! Take in the long history of these open-wheel racers and… More →

Read all about it! The history of the printing press started centuries ago. Through the years, it has been used to share news, make books more affordable, and make information more… More →

Journey to the red planet! Given its similarity to Earth, Mars has long fascinated humans. Today, we are closer than ever to unlocking the mysteries of how Mars formed and whether the planet… More →

Only 12 humans have walked on the Moon. But scientists have learned a lot about Earth’s night light. We know how it was formed, about its relationship with Earth, and its surface features.… More →

Whether Lamborghini or Ferrari, sports cars turn heads! These flashy cars look cool but are built for speed. Through the years, sports cars have pushed design, gone electric, and even reached More →