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Back up to: In Their Element

1. Silicon - The World's Building Block

   The key component of rocks, sand and materials from glass and concrete to microelectronics
2. Carbon - the backbone of life

   Why is all known life built on carbon?
3. And then there was Li

   The element that links the formation of the universe with the functioning of our brains.
4. Oxygen: The Breath of Life

   Trevor Cox takes a deep breath and tells the story of oxygen on earth and in space.
5. Mercury - Chemistry's Jekyll and Hyde

   The most beautiful and shimmering of the elements, the weirdest, and yet the most reviled.