Does campfire smoke follow you? It's not your imagination. Here's a look at the science of how it works and what you can do to stop it.
How Stuff Works
Learn what reverse osmosis is and how it works for water purification. Learn what it does and does not filter out of water.
What Is Reverse Osmosis?
Learn how to remove a glass stopper that's stuck on a decanter or piece of chemistry glassware easily and effectively.
How to Remove a Stuck Glass Stopper
Learn how a one way or two way mirror works and see how to tell if a mirror is two way using three simple and easy tests.
How a Two Way Mirror Works
Learn why helium balloons deflate and sink. Explore the effect of temperature on gas density and use it to make a balloon float.
Why Do Helium Balloons Deflate and Sink?
Is it true real snow doesn't melt when you put a lighter to it or try to set it on fire? Here's the answer and the science behind it.
Why Doesn’t Snow Melt When You Put a Lighter to ...
Learn about the difference between oxygen bleach and chlorine bleach. Compare the pros and cons of each type of bleach.
Oxygen Bleach vs Chlorine Bleach
Learn about mood ring colors including mood ring color meanings, how the colors are produced, and whether the rings work to tell emotions.
Mood Ring Colors and Their Meanings
Learn the causes and risks of yellow snow. Find out about other colors of snow, including red, green, and blue.