All life, as far as we know, assembles itself molecule by molecule. The blueprint for our bodies is encoded on ribbons of DNA and RNA. Cellular factories called ribosomes make these blueprints physical by linking amino acids into long strands called proteins. And these proteins, of which there are hundreds of millions, form an array of spectacular natural technologies: Eyes, muscles, bones, and brains. Read more about Scientists Build the First Crucial Components of a Molecular Computer