Behind the click-bait title: CRISPR and cas gene sequences are made to precisely replace some gene sequences with others. Huge potential impact, indeed, for better and for worse.

Behind the click-bait title: CRISPR and cas gene sequences are made to precisely replace some gene sequences with others. Huge potential impact, indeed, for better and for worse.
http://www.businessinsider.com/the-biggest-biotech-discovery-of-the-century-is-about-to-change-medicine-forever-2015-2