A crane is a tower or derrick equipped with cables and pulleys that can be used both to lift and lower materials and to shift them horizontally. Cranes are commonly employed in the construction industry and in manufacturing heavy equipment. Construction cranes are usually temporary structures, either fixed to the ground or mounted on a […]

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April 25, 2013


Hexagon: a polygon having six sides.

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April 18, 2013


Sandstorms are not just the stuff of legend; rather, they’re a real phenomenon in which strong, dry gusts of wind sweep over a desert area and create massive “clouds” of sand and dust. Sandstorms reduce visibility and can grind the daily life of a city to a halt if they are severe enough. They are […]

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April 15, 2013


Every galaxy in the universe has on average one hundred billion stars in it. The vast majority of these stars are small and difficult to see: cool red dwarfs and dim white dwarfs.

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March 28, 2013

Water and Oil

Why they don’t mix

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March 14, 2013


Planetarium explained, for kids

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March 7, 2013

Dry Eye

Dry eye occurs when the eye does not produce tears properly, or when the tears are not of the correct consistency and evaporate too quickly. In addition, inflammation of the surface of the eye may occur along with dry eye. If left untreated, this condition can lead to pain, ulcers, or scars on the cornea, […]

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February 28, 2013


Balance is defined as a state of equilibrium.

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February 21, 2013


Antibiotics explained, for kids

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February 14, 2013


Indigestion explained

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December 27, 2012


Whales are the largest animals. The largest whale is the giant blue whale which can reach lengths of 90-100 feet and weight as much as 120-150 tons. The commonly seen finback whale is the second largest animal to ever appear on earth.

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November 8, 2012


cyclones explained, for kids

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October 18, 2012


matches explained, for kids

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September 27, 2012


A rhinoceros is any of five surviving species of odd-toed ungulate in the family Rhinocerotidae. All five are native to Africa or Asia.

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September 20, 2012


“Perspective” in art

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September 13, 2012


centipedes explained, for kids

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August 9, 2012

Minerals explained, for kids

Minerals explained, for kids

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August 2, 2012

Migraine Headaches

Migraine headaches explained for kids

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July 26, 2012



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July 12, 2012

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