You might have heard that fluorescent bulbs are supposed to be more efficient than normal light bulbs, but is this really the case? See more »

I have read that it is possible for people to listen in on baby monitors. Is this true? Can people hear my baby monitor? See more »

Air conditioning has fundamentally changed how people experience the world. When it's hot outside, walking into an air-conditioned house is like walking into another season. How do air conditioners keep us cool? See more »

Americans spend an estimated $250 million annually on air purifiers for their homes. Asthma and allergy sufferers are responsible for most of these sales. How can you benefit from owning an air purifier? See more »

They've been bringing us relief from the heat since the late 1800s, but do you know how ceiling fans really work? And, did you know they can help keep you warm in the winter? See more »

Humidity is bad enough when it's outdoors. When it seeps into your home, that moisture-filled air can make you uncomfortable or even ill, as well as cause damage to your home. How can a dehumidifier prevent this? See more »

A regular light switch takes care of off and on. A dimmer switch handles off, on and everything in between. Find out what this clever switch does with electrical current. See more »

Heating pads are made of a plastic pouch and a clear liquid. Inside the pouch is a metal disk that when clicked crystallizes the liquid causing it to heat up. Find out how heat pads work. See more »

How do candles work? What keeps the wick burning, seemingly forever, when the same twine would completely burn up in a matter of minutes if it weren't engulfed in wax? Why won't the wax burn without a wick? See more »

Fluorescent starters are used in several types of fluorescent lights. The starter is there to help the lamp light. See more »