Uncovering the secrets of ancient rock art using 'X-ray vision'

Prehistoric rock paintings are a source of fascination across the world. Aside from their beauty, there's deep meaning in these strokes, which depict ancient rituals and important symbols. To learn more about these murals, ...

Inert nitrogen forced to react with itself

Constituting over 78 % of the air we breathe, nitrogen is the element found the most often in its pure form on earth. The reason for the abundance of elemental nitrogen is the incredible stability and inertness of dinitrogen ...

Video: Heroines of the periodic table

In 1871, Dimitri Mendeleev presented his periodic table to the world. Many of the current 118 elements were missing, and he left placeholders for those yet to be discovered. Each element has a unique story of scientific discovery.

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