Carles Puche
Illustrator, Barcelona (Spain).

«The time has come to close the book on infectious diseases. We have basically wiped out infection in the United States». These optimistic words were addressed to the United Nations General Assembly in 1966 by William H. Stewart, the Surgeon General of the United States (leading spokesperson on matters of public health).
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The sun formed about 5,000 million years ago. Since then it has been rotating around the Milky Way, which takes around 226 million years.

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The big tree of life based on ribosomal RNA

Nature’s complexity goes beyond human imagination. The discovery and exploitation of biodiversity has undoubtedly helped us to reach a certain level of understanding of

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