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Why are they replacing all of the traffic lights in my town?
auto.howstuffworks.com/car-driving-safety/safety-regulatory-devices/question178.htm
In my town, they are replacing all of the traffic lights with these new lights that look like they are made of hundreds of tiny bulbs. Why are they replacing all of the lights?
Someone started controlling my computer over the Internet -- what happened?
computer.howstuffworks.com/question179.htm
Someone started controlling my computer over the Internet -- what happened?
Why do some Web sites include www in the URL while others don't?
computer.howstuffworks.com/internet/basics/question180.htm
If a URL does not include "www," is it not on the "Web"? What is the difference between sites that do and don't require the "www" in the URL?
Can you calculate how far away lightning struck by thunder?
science.howstuffworks.com/nature/climate-weather/storms/question182.htm
You may have heard that you can figure out how far away lightning is by how long it takes for the thunder to arrive after you see the flash. Is this true? How do you calculate it?
How Is Color Added to Old Black-and-white Movies?
entertainment.howstuffworks.com/question184.htm
Love it or hate it, most of the classic black-and-white movies have been "colorized," mainly so that they can be shown on television in color. How does the colorization process work?
Why Is It Colder at the Top of a Mountain Than It Is at Sea Level?
science.howstuffworks.com/nature/climate-weather/atmospheric/question186.htm
Air temperature is colder on top of a mountain than at sea level, but if heat rises how is this possible? Learn about air temperature in this article.
How does the Cave of Magic card trick work?
entertainment.howstuffworks.com/question187.htm
Will you please go to The Cave of Magic and tell me how this can possibly work? It has some of my friends convinced that we are being taken over by computers.
Is the American Flag Still on the Moon? Objects Astronauts Left Behind
science.howstuffworks.com/question188.htm
Apollo astronauts left a lot of stuff behind on the moon. Can you see any of that from Earth, even with a telescope?
Is Chlorine Bleach? How to Use Chlorine-based Cleaning Products
science.howstuffworks.com/question189.htm
I recently used chlorine bleach to clean the siding on my house, and I was amazed at how well it worked! What is bleach? How does it remove stains? Is the chlorine in bleach the same as the chlorine in drinking water or in swimming pools? Is chlorine safe to use?
Why is carbon monoxide poisonous?
science.howstuffworks.com/question190.htm
I have heard that carbon monoxide is extremely poisonous. Can you explain why?