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Why am I not allowed to use my cell phone in airplanes or hospitals?
electronics.howstuffworks.com/question230.htm
Electromagnetic interference can create problems in some equipment in airplanes and hospitals. Learn about electromagnetic interference from cell phones.
If Your U.S. Money Gets Shredded, You're Not SOL
money.howstuffworks.com/shredded-money.htm
What happens when your cash gets damaged due to fire, flood or Fido deciding to eat it? Are you out of luck? HowStuffWorks tells you what to do next.
11 Basic Math Symbols and How to Use Them
science.howstuffworks.com/math-concepts/basic-math-symbols.htm
Math is a language of symbols and equations and knowing the basic signposts is the first step in solving mathematical problems.
Could blood be used to power batteries?
electronics.howstuffworks.com/everyday-tech/blood-battery.htm
Blood batteries as thin as a sheet of paper are currently under development by scientists at Rensselaer Polytechnic Institute. Read about blood batteries.
How Verbal Irony Works: Examples and Practical Uses
entertainment.howstuffworks.com/arts/literature/verbal-irony.htm
Verbal irony is a clever twist of language that keeps conversations interesting and adds humor by contrasting what is said with what is meant.
The Best-selling Beer in America Isn't From the U.S.
money.howstuffworks.com/best-selling-beer-in-america.htm
Beer is as much a part of American culture as burgers and baseball. Look at any tailgating party, Sunday cookout, after-work happy hour or marathon recovery tents; you'll see that ice-cold beer has become a ubiquitous social staple. And the best-selling beer in America reflects trends in consumer preferences.
Should the U.S. Move to Permanent Daylight Saving Time?
science.howstuffworks.com/environmental/earth/geophysics/permanent-daylight-saving-time-news.htm
Few Americans like the switching between Daylight Saving Time and Standard Time, but there's conflict on whether to switch permanently to DST or to ST.
Why Does the U.S. House of Representatives Have Only 435 Seats?
people.howstuffworks.com/house-representatives-435-seats.htm
That's about one House member for every 761,169 people, which is far less representative than when the nation was founded. How can that be changed?
Will the U.S. Ever Run Out of Telephone Numbers?
electronics.howstuffworks.com/phone-number-shortage.htm
The list of usable phone numbers runs into the billions, but the number is not infinite. So, what happens if we run out?
How to Use the Unit Circle in Trigonometry
science.howstuffworks.com/math-concepts/unit-circle.htm
A unit circle is an important part of trigonometry and can define right angle relationships known as sine, cosine and tangent.