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How does a chicken's egg get its shell?
science.howstuffworks.com/innovation/science-questions/question231.htm
How do chickens create eggs? Does the chicken's body make the shell and fill it with the white and yolk somehow, or does it make the white and yolk and then somehow wrap the shell around it?
Are fluorescent bulbs really more efficient than normal light bulbs?
home.howstuffworks.com/question236.htm
You might have heard that fluorescent bulbs are supposed to be more efficient than normal light bulbs, but is this really the case?
How do motion sensing lights and burglar alarms work?
home.howstuffworks.com/home-improvement/household-safety/question238.htm
How can motion-sensing lights detect your presence, and what prevents them from seeing you when you're standing still? It all comes down to the movement of light.
How does a Crookes' radiometer work?
science.howstuffworks.com/question239.htm
I once saw this device shaped like a light bulb. It had a vertical support inside it, and on that support there were four vanes with four diamonds on the end. One side of the diamond was black and the other was white. I did a little research and found out that it was called a Crookes' radiometer -- how does it work?
How do fog machines work?
entertainment.howstuffworks.com/arts/theater/question240.htm
How do fog machines work?
How Many Senses Do Humans Have?
science.howstuffworks.com/life/inside-the-mind/human-brain/question242.htm
We've all heard of a "sixth sense" and extra-sensory perception. So how many ways can we actually sense the world around us?
How Does a Fresnel Lens Work? The Magic Behind the Glass
science.howstuffworks.com/question244.htm
I have a thin piece of plastic mounted on the back window of my RV. It magnifies things so I can see better when I'm backing up. How can such a thin piece of plastic magnify things? A regular glass magnifying lens would have to be curved on both sides and much thicker.
Stored Energy Methods (Other Than Rechargeable Batteries)
science.howstuffworks.com/environmental/energy/question247.htm
One way to store energy is to use a battery, but what other ways can we store energy? Learn about different ways to store energy at HowStuffWorks.
Why is it that some Web pages seem to trap me so I can't get out?
computer.howstuffworks.com/internet/basics/question249.htm
I accidentally got into a Web site the other day that would not let me out. Even when I tried to close the window, it would pop up again -- it was unbelievable! How do they do that?
How To Tell if Your Phone Is Tapped
electronics.howstuffworks.com/question250.htm
It's possible and relatively easy for someone to tap into your phone line or cell phone. With a few tips, it's also easy to tell if someone tapped your phone.