Before the invention of mechanical clocks, timepieces used the sun’s motion or simple measurement devices to track time.

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October 24, 2011


periscopes explained, for kids

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October 13, 2011


Elasticity explained, for kids

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September 15, 2011


HOLOGRAPHY is the process of recording a three-dimensional image of an object using the special properties of light from a LASER. Unlike photography, which only records the brightness and contrast of an object, a HOLOGRAM records brightness, contrast and DIMENSION. This allows holography to display the final image in true 3D. You do not need […]

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September 8, 2011

Vinyl Records

vinyl records explained, for kids

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September 1, 2011


Wireless technology, brief explanation for kids

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August 25, 2011


spine explained, for kids

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August 18, 2011


Rubber explained, for kids

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August 11, 2011

Wisdom Teeth

Wisdom teeth are the third and final set of molars that most people get in their late teens or early twenties. Sometimes these teeth can be a valuable asset to the mouth when healthy and properly aligned, but more often, they are misaligned and require removal.

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August 4, 2011


Wind meters explained, for kids

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July 28, 2011

The Pulse

Feeling the pulse is one of the hallmarks of the medical profession, and has been for many a century. As well as being informative, this action can give the doctor something physical to do while he takes time to think. The pulse is most commonly felt where the radial artery lies near the surface on […]

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July 14, 2011


cheese explained, for kids

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July 7, 2011

Fault Lines

Normal faults generally occur in places where the lithosphere is being stretched. Consequently they are the chief structural components of many sedimentary rift basins (e.g. the North Sea) where they have major significance for hydrocarbon exploration. They can also be found in deltas, at the rear edges of huge gravitation slumps and slides. Normal faults […]

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June 30, 2011


fermentation explained, for kids

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June 23, 2011

Hearing Aids

A hearing aid is a small electronic device that you wear in or behind your ear.

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June 16, 2011


Dehydration occurs because there is too much water lost, not enough water taken in, or most often a combination of the two.

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June 9, 2011


The stingrays are a group of rays, cartilaginous fishes related to sharks. They are classified in the suborder Myliobatoidei of the order Myliobatiformes, and consist of eight families: Hexatrygonidae (sixgill stingray), Plesiobatidae (deepwater stingray), Urolophidae (stingarees), Urotrygonidae (round rays), Dasyatidae (whiptail stingrays), Potamotrygonidae (river stingrays), Gymnuridae (butterfly rays), and Myliobatidae (eagle rays). Most stingrays have […]

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June 2, 2011


Mulch explained, for kids

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May 26, 2011

Chlorine explained, for kids

•    Chlorine is an element used in industry and found in some household products. •    Chlorine is sometimes in the form of a poisonous gas. Chlorine gas can be pressurized and cooled to change it into a liquid so that it can be shipped and stored. When liquid chlorine is released, it quickly turns into […]

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May 19, 2011

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