If you decide to go nameless, the cops won't hunt you down and throw you in the slammer. But you may have trouble functioning in society.
How Identity Theft Works | How Social Security Numbers Work

It's not just a homeowner's nightmare -- toxic mold can damage your lungs and suppress your immune system. Where does it come from, and what can you do to keep it out of your home?
How Your Immune System Works | How Allergies Work

Humans kill approximately 100 million sharks every year. Some are harvested for their cartilage, which is thought to contain cancer-fighting properties. Is there any truth to the claim?
How Sharks Work | How Cancer Works

When you spy your slim self in the mirror, you probably wonder where that lost weight went. As you've exercised and dieted, your body has been rearranging molecules for a sleeker physique.
How Body Mass Index Works | Is a lack of sleep making me fat?

Somewhere along the way, most of us have heard that we're not supposed to remove the tags from our mattresses or pillows because it violates some kind of law. What gives?
How Sleep Works | How Sleepwalking Works

Who needs land when you have ships that can feed, house and entertain thousands of people in style? But what keeps one of these oceangoing behemoths from sinking like a brick?
How Houseboats Work | How Aircraft Carriers Work

Teenagers everywhere can thank NASA for inventing the material that makes those invisible braces invisible. NASA is also behind athletic shoes, scratch-resistant lenses and cordless vacuums.
How NASA Works | How Spacesuits Work

This house uses the sun to power its refrigerator, gravity to pump water through its pipes and bacteria to break down its trash. How does it redefine green design?
How Green Building Works | Ten Sustainable Buildings

Which is most impressive -- the tallest building in the world, a man-made island shaped like palm leaves or an indoor ski park complete with snow?
Alaska Image Gallery | Egyptian Pyramid Image Gallery

Ribs, chicken and lots of barbecue sauce. Steaks, burgers, hot dogs and assorted veggies. Summer is prime grilling season. Ever wonder how these treats get so tasty?
How to Grill | How Food Works

Marshall Brain, the original brain behind HowStuffWorks, delves into the pain of eating hot peppers, how to get your life in shape and whether pregnant women should use cell phones.
Podcast: How Buying an HDTV Works