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Why do I need an electrical adapter when I travel overseas?

science.howstuffworks.com/innovation/science-questions/question430.htm

Although technology is helping to make the world seem a lot smaller, there are still major differences between countries. Learn about electrical standardization around the globe.

How are the Voyager spacecraft able to transmit radio messages so far?

science.howstuffworks.com/question431.htm

The Voyager spacecraft use 23-watt radios. This is higher than the 3 watts a typical cell phone uses, but in the grand scheme of things it is still a low-power transmitter. The key to receiving the signals is therefore not the power of the radio, but a combination of three other things.

What does open source mean?

computer.howstuffworks.com/question435.htm

What would you do if you could customize the software on your computer? Learn about open source code and how applications might be more useful and error-free in the long term.

Where does the color come from in purple cabbage?

science.howstuffworks.com/life/botany/question439.htm

Nature uses color in lots of different ways. Find out why some types of cabbage are purple and what this means.

How does Dursban work?

home.howstuffworks.com/question440.htm

How does the pesticide Dursban work? Does it have the same effect on humans that it has on insects?

If water is made up of hydrogen and oxygen, why can't we breathe underwater?

science.howstuffworks.com/question386.htm

If water is made up of hydrogen and oxygen, why can't we breathe underwater? It has to do with how molecules combine and how the human lung functions.

How do the blue-ish headlights on expensive luxury cars work?

auto.howstuffworks.com/question387.htm

I notice that there are certain cars whose headlights seem to have a blue-ish or green-ish tint. A lot of times these headlights are on expensive cars. Are these headlights different from normal headlights?

Will we ever have space ships parked in our garages?

auto.howstuffworks.com/under-the-hood/trends-innovations/question389.htm

Will we ever have spaceships parked in our garages so that we can fly to the moon whenever we feel like it?

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