In the Know

What does “endangered species” mean? A species is a group of similar living things. Tigers, butterflies, trees, and flowers are all different species. A species is considered endangered if there are so few left alive … Read more

Have you ever heard of a black hole? Black holes are objects in space. They have so much gravity, not even light can escape them. Scientists recently found a giant black hole. It is at the center of our galaxy, the Milky Way. It has more than … Read more

You probably like to eat pizza. But do you like to make it? If you do, you are a chef and a scientist! When you make pizza dough, you mix yeast with water. This makes … Read more

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