In the Know

Have you ever wondered why we feel fear? Feeling afraid is a survival mechanism [a system of parts working together]. Our brains are equipped with a fight-or flight response. This response lets us fight a … Read more

What do you picture when you think of concrete? You might picture sidewalks, roads, or bridges. Félix  Candela Outeriño imagined something more creative. He was a Spanish and Mexican architect (someone who designs buildings). Candela … Read more

Emmett Chappelle was a scientist who was born in Phoenix, Arizona. He grew up in a time when schools were segregated. This meant that he attended an all-Black high school. In 1966, he began working … Read more

Fireworks are a fantastic outdoor show. Their bright bursts of color and loud booms can be seen and heard at Fourth of July and New Year’s Eve celebrations across the United States. But do you … Read more

Have you ever seen so many fireflies? These fireflies are different from the ones you might see on a summer night. They are called synchronous fireflies because they “sync” their flashing and all flash at … Read more

A laser is a thin, powerful beam of light. Lasers use mirrors to focus light energy. People use lasers every day. You may even have a laser at home. A DVD player uses a laser to read the information on … Read more

Earth is worth celebrating. It’s the only planet we can call home! Earth is not too hot and not too cold. One thing that keeps Earth from getting too cold is its atmosphere [layer of … Read more

Look around you. Everything you see was invented by someone! Inventors follow a process much like the engineering design process you use in science class. Engineers and inventors start by identifying a problem. Then they … Read more

What Is a Heart? Place your hand on the left side of your chest. Do you feel anything? Try again after exercising. Do you feel it now? That’s your heart! Your heart is a muscle. … Read more

Bundle up! It’s time to explore the ice caves of the Apostle Islands. These caves are located along the shore of Lake Superior in Wisconsin. What can you see in the ice caves? Lots of … Read more