In the News

Less Travel Helps Clean the Air

What Is Nitrogen Dioxide?  You can’t see nitrogen dioxide. It’s a gas made by cars, trucks, buses, power plants, and factories. Too much nitrogen dioxide causes smog and acid rain. It can make people sick, too. Nitrogen dioxide is partly to blame for … Read more

In the Know

How Do People Use Lasers?

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

Supreme Court
In the News

Supreme Court Hears Cases Remotely

stop the spread of COVID-19. It’s not just schools that are meeting remotely. Even the justices of the Supreme Court of the United States are hearing their cases remotely—over the phone. This is the first … Read more