Your warm and comfy home is inviting to thousands of unwanted guests, such as dust mites, mold spores and chemical irritants. These unwanted guests can greatly exacerbate your allergy symptoms. Take this quiz to learn about indoor allergens and how to prevent these unwanted guests from taking over your home.
How much do you know about how car engines work? And how much do you know about how the English language works? And what about how guns work? How much do you know? Lucky for you, HowStuffWorks is about more than providing great answers about how the world works. We are also here to bring joy to your day with fun quizzes, compelling photography and fascinating listicles. Some of our content is about how stuff works. Some is about how much you know about how stuff works. And some is just for fun! Because, well, did you know that having fun is an important part of how your brain works? Well, it is! So keep reading!