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In the 21st century, even the toughest of metals are now being replaced by synthetic carbon-based materials that are so strong, light, and resistant to high temperatures that they can be used in the construction of high-performance aircraft.  How....

From the moment of their discovery, each of the chemical elements has embarked on a journey into our culture. Over millennia and decades, they have gained meaning through encounter and manipulation. Those long known, such as gold, silver, iron and su....