early 2018, he began to discuss the possibility of not only reading human genomes but also editing them. “For billions of years, life progressed according to Darwin’s theory of evolution: random mutation in DNA, selection and reproduction,” he wrote on his website. “Today, genome sequencing and genome editing provide powerful new tools to control evolution.” His goal, he said, was to sequence a human genome for $100, then move on to fixing any problems. “Once the genetic sequence is known, we can use CRISPR-Cas9 to insert, edit or delete the associated gene for a particular trait. By
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