In the Know
What Can Lasers Do?
Lasers use mirrors to concentrate light energy into a thin, powerful beam. You might be surprised by how often people use lasers. In fact, you may have a laser at home. A DVD player uses a laser to … Read more
Articles by Karen Sharma
In the News
Travel Restrictions Help Reduce Air Pollution
A Dangerous Gas Nitrogen dioxide (NO2) is a gas that is released into the air when fuel is burned. Emissions from cars, trucks, buses, power plants, and other industrial facilities release nitrogen dioxide. The environmental impact of nitrogen dioxide includes smog and acid rain. … Read more
In the Know
Join the Climate Change Fight on Earth Day
How are you celebrating Earth Day this month? You might be doing things to help fight climate change, like recycling or planting a tree. But what exactly is climate change, and why is it happening? … Read more
In the News
Take a Bite Out of Climate Change
The countdown to Earth Day 2020 has begun! This year’s main theme will focus on climate action. Climate change represents a major issue that impacts life on Earth. It involves changes in weather patterns, and … Read more
In the Know
Innovative Inventors
Take a look around you. Everything you are sitting on, holding, and looking at was invented by someone! Do you ever wonder how people get ideas to invent new things? Inventors and engineers follow a … Read more
In the News
Spring Forward, Fall Back
Have you ever wondered why clocks “spring forward” and “fall back”? Two days each year, many people change their clocks to follow daylight saving time. The clocks are set one hour ahead in March to … Read more
In the News
World Changing Contributions
Did you know that Black History Month started in 1926 as a one-week event to bring attention to the contributions of African Americans? The event became so popular that by 1976, President Gerald Ford made … Read more
In the Know
Hearts in Animals
The Heart’s Job You probably know you need oxygen to live. In fact, all the cells in your body need oxygen—and your heart makes sure they get it. A heart is an organ inside you … Read more
In the News
Predicting the Weather Just Got Easier!
From students hoping for a snow day to long-distance travelers, everyone wants to know about the weather. Forecasting weather is among the greatest scientific achievements of the last century. Meteorologists can predict weather about a … Read more
In the Know
Icy Adventure
It’s winter, and the air is cold but calm. You’ve just trekked a mile across a frozen section of Lake Superior. You’re ready to explore the ice caves of the Apostle Islands! These caves are … Read more