Hank brings us another simple experiment that demonstrates the important biochemical process of osmosis by turning a chicken egg into a frightening alien-looking thing.

In the wake of Hurricane Sandy, Hank answers some frequently asked questions about it, and how it got to be so crazy. What is up with this storm? Has this ever happened before? This is global warming right?

Howcast - Learn how to dance like Chris Brown to Drop It Low from Matt Lopez and DEF-C Crew in this hip-hop dance video, part two in a two-part Howcast series.

Howcast - Learn how to dance like Ester Dean to Drop It Low from Matt Lopez and DEF C Crew in this hip-hop dance video, part four in a five-part Howcast series.

Howcast - Learn how to dance like Ester Dean to Drop It Low from Matt Lopez and DEF-C Crew in this hip-hop dance video, the fifth in a five-part Howcast series.

Howcast - Learn how to dance like Chris Brown to Drop It Low from Matt Lopez and DEF-C Crew in this hip-hop dance video, the first in a two-part Howcast series.

Howcast - Learn how to dance like Ester Dean to Drop It Low from Matt Lopez and DEF-C Crew in this hip-hop dance video, part two in a five-part Howcast series.

Howcast - Learn how to dance like Ester Dean to Drop It Low from Matt Lopez and DEF-C Crew in this hip-hop dance video, the first in a five-part Howcast series.

Howcast - Learn how to dance like Ester Dean to Drop It Low from Matt Lopez and DEF-C Crew in this hip-hop dance video, the third in a five-part Howcast series.

The pressure that blood exerts against the walls of blood vessels.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig...

The spread of particles from an area of high concentration to an area of low concentration.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual...

A compound which dissolves in water to form a solution with a pH of less than 7.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual...

Where does the electricity we use come from? Are we damaging our environment just to keep the lights on? Earth Science - Earth's Resources - Learning Points. Electricity is essential to our society and the way we live. Electricity...

Humans can only hear a certain range of sound frequencies. Discover the sounds we can't hear and why they can be useful. Physics - Waves - Learning Points. The frequency of sound waves determines whether we can hear them. High-frequency...

Heat waves form when an area of high pressure becomes stationary over a region. The heat wave that struck Chicago brought hot sunny tropical weather, but its effects were devastating. Earth Science - Weather - Learning Points. A heat...

The factors affecting global oil prices, and what can happen if prices shift dramatically. Earth Science - Earth's Resources - Learning Points. Oil price is determined by the current supply to world markets, the amount in reserves, and...

Find out how musicians tune their instruments.
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Physical processes - Sound -
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Learning Points
Pitch depends on the frequency of sound waves


– the number of waves per...

Meet the howler monkey – the loudest animal on land.
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Physical processes -
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Learning Points
Volume is a m
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asure of the loudness of a sou
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Find out about infrasounds – sounds that are too low-pitched to be heard by humans.
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Learning Points
Infrasounds are
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oo low-pitched for...

Dr. Forrester explains the qualities of sound, pitch and volume, and how sound is created through vibrations.

Miss Palomine hosts a game show called “What Kind of Sound is That?” Besides identifying the sound, the student must determine if the sound is loud, soft, high, or low.

This song is a "call and response" that teaches numbers 1 - 10 using fun farm rhymes and calls to action.

A Bomb Cyclone is a middle-latitude low pressure storm system. It must have falling air pressure, measured by a barometer, losing at least 1 millibar per hour for 24 hours. When the pressure in a storm falls, the wind increases. You hear...

After Brexit, the UK will have a lot more control over their laws, taxes and tariffs. It could, and according to some, should use this power to become a tax haven. So can the UK become a tax haven and should it?