Grades 2 - 5

The largest human organ is skin! Every inch of skin is made up of millions of tiny receptors that allow us to feel the world around us. Each type of receptor has a job. Some tell us the… More →

The sense of smell is one of the most interesting human senses! A familiar scent may trigger forgotten memories. The smell of smoke warns of danger. The smell of cooking food may cause… More →

Without the help of the nose, humans would only be able to recognize five types of tastes: sweet, sour, salty, bitter, and savory. But with our sense of smell, we are able to pass messages to More →

Twenty-five times faster than the speed of sound, rockets are high-speed space delivery machines. Every week, at least one rocket launches into space from somewhere in the world! This title… More →

Clinging below the ocean's surface are small creatures with horse heads and monkey tails. Sea horses may have parts that look like other animals, but they are their own unique specimen. In… More →

Jellyfish are graceful, beautiful ocean animals. But their looks are deceiving. Those long, wavy tentacles can really sting! Jellyfish are often transparent. They do not have bones, blood, or More →

Grasslands vary around the globe and are home to many life forms, including big cats and grazing animals. These sprawling fields are found on every single continent except Antarctica.… More →

Temperatures rarely rise above freezing on this icy, windy continent. Because of its harsh climate, only the toughest can survive. Penguins, whales, and seals dive into the chilly water and… More →

A country and a continent, Australia is home to bizarre wildlife such as platypuses, emus, and wombats. Australia also boasts the Great Barrier Reef that stretches more than 1,400 miles… More →

Submarine volcanoes and giant mountain chains lie deep below the Indian Ocean’s surface. Where the Indian Ocean ends has been debated, but it’s indisputably nestled between Africa, Asia, and… More →

Coral reefs are home to thousands of living species, including some of the most vibrant plants and animals on the planet. Many reef inhabitants help each other survive. Sea anemones, for… More →

For millions of years, forests have hosted complex life forms. Trees reach toward the sun as creatures of all shapes and sizes interact with their environment. Birds nestle on sturdy branches More →