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Dr. Know: Dirty Sponges

Dr. Know reveals that toilets are dirty, but the kitchen sponge is dirtier still. Learn more about contamination, germs and disinfectants in this video from Discovery.


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Dr. Know: Dirty Sponges

Dr. Know: Dirty Sponges (0:28)

Dr. Know reveals that toilets are dirty, but the kitchen sponge is dirtier still. Learn more about contamination, germs and disinfectants in this video from Discovery.

Nuke Your Sponge

Nuke Your Sponge (1:29)

Watch this video from the University of Florida showing that nearly all of the bacteria found in a dish sponge can be killed after two minutes in the microwave. The sponge must be wet for this to work; be careful when removing it from the microwave.

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Deconstructed: Lawn Mower

Deconstructed: Lawn Mower (2:59)

On The Science Channel's "Deconstructed," discover how lawn mowers are a generator of a small hurricane. The complicated engine system of lawn mowers drive both the blades and the wheels.

Deconstructed: Bread Toaster

Deconstructed: Bread Toaster (3:02)

On The Science Channel's "Deconstructed," take a look inside a bread toaster. Learn how the grid heats up and the lever spring prevents the toast from flying across the room.

Sci Fi Saved My Life: Bomb Shelters

Sci Fi Saved My Life: Bomb Shelters (2:12)

"The Terminator," presents a grim vision of a future devastated by nuclear war. Weary of a possible real life threat, many have built bomb shelters underneath their houses. Learn more on The Science Channel's "Sci-Fi Saved My Life."

Deconstructed: Propane Grill

Deconstructed: Propane Grill (2:44)

Learn how a propane grill and all its components work on The Science Channel's "Deconstructed."

Deconstructed: Digital Scale

Deconstructed: Digital Scale (2:02)

If you want to be precise with your weight, the digital scale might be for you. In this clip from The Science Channel's "Deconstructed", we learn how this heavyweight technology works.

Deconstructed: Mechanical Scales

Deconstructed: Mechanical Scales (2:43)

You can't hide the truth from the bathroom scale. In this clip from "Deconstructed" on The Science Channel, learn the technology behind the mechanical scale.

Deconstructed: How Toilets Work

Deconstructed: How Toilets Work (3:01)

Learn about the flushing mechanism of a toilet in this clip from "Deconstructed" on The Science Channel.

What the Ancients Knew: Spinning Wheel

What the Ancients Knew: Spinning Wheel (1:11)

The ancient Indians used the spinning wheel to create soft and beautiful garments. See how the wheel originated in this clip on The Science Channel's series, "What the Ancients Knew."

In a Split Second: Preventing Accidents in the Home

In a Split Second: Preventing Accidents in the Home (29:30)

Every five seconds there is a serious accident in the home. Aimed at lowering that statistic, this program demonstrates to parents and other caregivers how they can take precautions to prevent common accidents.

How It's Made: Chain Saw

How It's Made: Chain Saw (3:21)

Chain saws are pretty useful and easy to build -- you can even make one at home. Learn how to make a chain saw from scratch in this video.