From turning on lights to charging phones, electricity is everywhere. This topic is popular because children see electricity at work every day but often wonder where it comes from and…

Most people know that exercise makes the body strong, but scientists say it also makes the brain sharper and happier. This topic is popular because schools and doctors are encouraging…

Sea turtles have been swimming in Earth’s oceans for more than 100 million years, and this topic is popular because scientists and wildlife groups are working hard to protect these…

Every morning, the Sun rises and fills our world with light and warmth. This topic is popular because scientists say the Sun is the main source of energy for life…

Fire is one of the oldest discoveries made by humans, and this topic is popular because fire is still used every day — for cooking food, keeping warm and even…

Wind is something we feel on our faces but cannot see, and this topic is popular because wind affects weather, travel, sports and even electricity. From flying kites to cooling…

Have you ever wondered why summers feel hot, winters feel cold, and some places stay cool all year? This topic is popular because temperature affects how we dress, eat, travel…

Trees are often called the lungs of the Earth, and this topic is popular because scientists, teachers and environmentalists are reminding people how trees help keep the planet healthy and…

When we look up at the night sky, we see tiny shining dots called stars. This topic is popular because children often wonder what stars are made of and why…

Have you ever felt that holidays pass very quickly, but a boring class feels very long? This topic is popular because scientists say time itself does not change, but our…