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Can You Match the National Park to the U.S. State?
play.howstuffworks.com/quiz/can-you-match-the-national-park-to-the-us-state
There's so much more to America than fascinating buildings and elaborate cityscapes. This U.S. national parks quiz showcases nature's outstanding design achievements. Prepare to be wowed by stunning facts and photos!
Can You Name All of These World Heritage Sites?
play.howstuffworks.com/quiz/can-you-name-all-of-these-world-heritage-sites
We only have one Earth, and the easiest way you can show your appreciation for it is by recognizing its brilliance. Some of the world's most endangered animals, oldest cities and rarest land formations are protected in World Heritage Sites around the globe. Put your skills to the test and see if you can recognize them all.
When Were the Twin Towers Built?
science.howstuffworks.com/engineering/structural/wtc.htm
The twin towers of the World Trade Center were true originals -- their history is one of innovation, persistence and grand ideas.
How Carbon Capture Works
science.howstuffworks.com/environmental/green-science/carbon-capture.htm
We know that humans are largely responsible for fueling global warming with our carbon emissions. So what if we could seize all that carbon and squirrel it away in a safe place? Well, we can. It's just hard and really expensive.
How the Census Works
people.howstuffworks.com/census.htm
The U.S. census is a huge project bent on counting every U.S. resident. Find out about the changes for the 2020 census with HowStuffWorks.
How Passports Work
people.howstuffworks.com/passport.htm
A passport identifies a traveler as a citizen or national with a right to protection while abroad. Read more about using and applying for a passport.
How Vaccines Work
health.howstuffworks.com/wellness/preventive-care/vaccine.htm
A vaccine is, essentially, a cure for an illness or disease. Who came up with the idea for vaccines and do we give too many shots now?
How Baxter the Robot Works
science.howstuffworks.com/baxter-robot.htm
Baxter the Robot is a careful and friendly robotic coworker. Learn about the manufacturing robot Baxter.
A Guide to Home Safety
home.howstuffworks.com/home-improvement/household-safety/a-guide-to-home-safety.htm
Home safety is an important issue. Learn valuable safety precautions that will reduce the risk of an injury or death occurring in your home.
How Refrigerators Work
home.howstuffworks.com/refrigerator.htm
Without the refrigerator, you'd be salting your meat, tossing leftovers and drinking everything warm. Examine the inner workings of this food-preservation icon.