For four billion years, every virus on earth was written by evolution. Last week, sixteen were written by AI. Here's how they got made. A model generated thousands of viral genomes in an afternoon. Stanford picked 302, placed an order with a company that prints DNA, and the DNA arrived in the mail. Sixteen came alive and killed bacteria that had already survived every natural virus thrown at them. The hardest step was the paperwork. Screening those orders is voluntary in the United States. A…