The 14 billion-year-old story of evolution compressed into 12 months
All terrestrial life forms, from single-celled organisms to the rose and the elephant are constructed in a very similar way from a chemical point of view. They essentially consist of the same molecular building blocks, which chiefly contain the elements hydrogen (H), carbon (C), nitrogen (N), and oxygen (O). These four elements can form so-called covalent bonds, giving rise to stable and durable compounds.
