Fireflies glow because they are bioluminescent. That means they naturally contain a chemical that makes them light up. And fireflies aren’t alone! Other animals with this trait include jellyfish, glowworms, and anglerfish. They glow for protection, camouflage, or to attract mates. Animals aren’t the only …

Iceland is a large island. In fact, it’s the world’s 18th largest island. Most of the population, however, lives in the southwestern part of the country, in or around the capital city of Reykjavik. Most other areas of the country are sparsely populated. By …

Unlike airplanes, helicopters feature spinning wings called blades or rotors on top. As a helicopter’s blades spin, they create a force called lift that allows the helicopter to rise into the air. A helicopter’s rotors perform the same function like …

That first meal of the day is more commonly known as breakfast. If you divide this compound word into two parts, you’ll see it’s made up of “break” and “fast.” To fast means to go without food. So “breakfast” means to break the fast you’ve been observing since you …

Kiwi can refer to a few different things. For example, it’s a fruit that’s sometimes called kiwifruit. It’s also called Chinese gooseberry. These small, egg-shaped fruits have brown skin and bright green flesh with small, black seeds. Kiwifruit is soft …

Most spelling bees start out with short, easy words. You might be asked to spell “bake” or “sea.” As the competition goes on, though, words get longer and harder to spell. Suddenly, you’re doing your best to spell words like “league” and …