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Can Ball Lightning Be Created in Microwave Ovens? Are glowing orbs in a reheating appliance the same thing as ball lightning?
What Is the Strategic Petroleum Reserve? The Strategic Petroleum Reserve is a backup supply of crude oil that's pumped into deep underground salt caverns.
Why Do Doctors Wear Green Or Blue Scrubs? Green may be well-suited to help doctors see better in the operating room.
How Far Away is the Horizon? How far away is the horizon? It depends on your height, the temperature, weather and topography.
Can Frogs Survive Being Frozen? What happens to frogs in the winter?
Do Old Glass Windows Sag? Some people window glass, which can behave like a liquid, sags under gravity.
What's the Difference Between Alligators and Crocodiles? Coming face to face with a crocodile or an alligator, you'd likely see a mouth full of serrated teeth.
Can Snakes Smell Anything? Most snakes have an excellent sense of smell, in part to make up for their poor eyesight and limited hearing.
Do Snakes Have Ears? Snakes have no visible ear, so they don't hear sounds as we do.
Can Snakes See Well? Generally they can see shapes but not details.
What Are the Origins of Famous Patriotic Songs? You may know the lyrics to these popular patriotic tunes. But you may be surprised to learn about how they began.
How Do Other Countries Celebrate Their Independence? Citizens from other countries demonstrate their own unique traditions as they celebrate their nations' independence.
When Was the 4th of July First Celebrated? John Adams said Americans would celebrate Independence Day on July 2. Off by two days — not too bad for government work.
Who Created Uncle Sam? James Montgomery Flagg created the iconic illustration of Uncle Sam.
Who Discovered America? Columbus thought he'd found the East Indies. Truth was, he was in the Bahamas.
Can Fish Hear? Fish don't have ears that we can see, but they do have ear parts inside their heads.
Why Must Some Juices Be Refrigerated, Others Not? Refrigeration has long been used to keep microbes from making food hazardous.
Why Are Tree Rings Lighter or Darker? New wood formed in a tree during spring and summer is light in color.
Where Did 'Separation of Church and State' Come From? A radical immigrant is arguably responsible for church-state concept.
How Much Urine Can a Healthy Bladder Hold? A healthy adult bladder can hold up to 16 ounces of urine comfortably.
Does Washing Fruits and Vegetables Make Them Safe? Washing fruits and vegetables only removes some of the bacteria.
Can Plastic Bottles Make You Sick? Bisphenol-A, a plastic ingredient, may be on your mind — its safety has been questioned.
Why Are 250 Million Sperm Cells Released During Sex? The average male will produce about 525 billion sperm cells over a lifetime.
What Does 'Fast Metabolism' Mean? Metabolism refers to the calories the body uses at rest.
Why do wintergreen candies spark in the dark? Why do wintergreen candies spark in the dark?
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