Carlos Slim Helu has surpassed Bill Gates as the richest man in the world, according to a recent report. Find out how much Carlos Slim's fortune is worth.
How Banks Work | How Currency Works

Apple has finally released the long-awaited iPhone. Explore exactly how the iPhone's touch-screen carries instructions from your fingertips to the phone's internal circuitry.
How iPods Work | How Smartphones Work

Green roofs, long popular in Europe, are making their way into the United States. Find out what a green roof is and how it can solve some problems conventional roofs have.
How Global Warming Works | How Solar Cells Work

Breatharians believe they can live on only the energy from sunlight and do not need nourishment from food. Read all about the practice of Breatharianism.
How Organic Food Works | How Food Works

While humans try to create different types of artificial light, some animals make light naturally. Find out what bioluminescence is and how animals create their own light.
How Animal Camouflage Works | How Jellyfish Work

The toilet. The loo. The commode. No matter what you call it, there's no doubt it is a true technological marvel. Find out all about this fascinating water-handling system!
Plumbing Tools | Plumbing Basics

You may have noticed that some couples tend to look alike as they grow older. Find out what's behind this phenomenon as well as why some people resemble their pets.
How Love Works | How Marriage Works

Natural disasters, from wildfires to hurricanes, can cause devastation and heartache in an instant. Check out our image gallery of volcanoes.
Hurricane Images | Earthquake and Tsunami Images

The car engine is a staple of modern life, a piece of engineering genius and one of the most amazing machines we use on a daily basis. Watch this video and learn how the engine works.
Video: Prius | Video: Building a NASCAR Race Car

Free agents, restricted free agents, compensatory picks...what does it all mean? Find out how NFL teams fill positions in this annual event.
How American Football Works | How Baseball Works

July events in history include the UFO crash in Roswell, New Mexico. Learn more July trivia and facts about the month of July in history at HowStuffWorks.