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 →

Sea otters have the thickest fur of any mammal in the world! It is so thick and compact that their skin never gets wet. Dense fur is essential for sea otters as they swim through frigid… More →

With home ranges stretching across miles of frozen land, mountains, and dense forests, wolverines wander alone searching for their next meaty meal. These fearless fighters of the northern… More →

Squids are one of the most fascinating creatures of the sea! About 1,000 feet below the ocean’s surface, these cephalopods are experts at evading enemies. Some squirt ink, while others change 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 →

There’s much more to our ears than meets the eye! The human ear contains a chain of important links that work together to help us hear the world around us. From the ear’s tiny bones to its… 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 →

A group of river otters is on the lookout for a new home, and they aren’t about to start from scratch! These critters often crawl their way into the abandoned burrows of their riverside… More →

What has two opposable toes and is the only marsupial crawling through the forests and backyards of North America? It’s the opossum! These animals are often referred to as nature’s garbage… More →

The human eye is a complex machine that allows us to see the wonders of the world! The fuel for this machine is light. Each part of the eye communicates with light to allow us to see. Young… More →

It was an Earth satellite that started the space race between Russia and the United States. Russia sent Sputnik 1 into space in 1957, and the U.S. responded with Explorer 1 in 1958. In this… More →

The largest space machine to ever orbit Earth is the International Space Station. It is essentially a giant science lab for astronauts. Interested young readers are invited to enter the… More →