Symmetries and civilizations

Article Abstract:

An asymmetric culture and economy still exists in many parts of South Africa despite the various efforts to end segregation. However, all hope is not lost. Optimists believe that technology will be the key to the restoration of this nation's broken symmetry.

Economic aspects, South Africa

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Galileo's cicada

Article Abstract:

A parable offers insights on how sound is produced in different ways. The story tells of a man with extraordinary curiosity and intelligence who discovered that insects such as the cicada can also produce sound in addition to birds and stringed instruments.

Research, Analysis, Myths and legends, Sound, Galileo, Parables

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Dining on ammonia

Article Abstract:

The global production of synthetic nitrogen rose from 25 tons in 1900 to 90 million tons in 1990. The side effects of using synthetic nitrogen range from algae blooms that turn clear ponds green to nitrate runoff that endanger drinking water.

Environmental aspects, Nitrogen fertilizers, Nitrogen in agriculture

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