Bill and Melinda Gates are messing with nature. But they’re doing it to save the world. This week, their foundation gave away millions to make malaria-carrying mosquitoes extinct before long. On the way, they’ll have to tweak some DNA. Vox’s Joss Fong explains.

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Check out the Vox Video on the ethical debate over using genetically modified mosquitoes: https://bit.ly/2kBle83Learn more about your ad choices. Visit podcastchoices.com/adchoices