A futuristic gene-editing technology holds almost fantastical promise to turn biologists' wildest dreams into reality. The technology called CRISPR could one day be used to delete the HIV virus from patients' cells, create a limitless supply of organs for transplant and produce better crops. Already, it's being used in laboratories across the world. This week, the fierce battle over who invented it officially kicked off, with hundreds of millions of dollars on the line.
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