Genetically modified mosquitoes are released in Piracicaba, Brazil, in an effort to combat Zika virus. These mosquitoes were modified using conventional techniques. Victor Moriyama/Getty Images hide caption

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New Genetic Engineering Method Called Promising — And Perilous

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Milo Lorentzen is 5 years old, and is one of only three people in the world known to have a mutation in a gene called KDM1A. Courtesy of Karen Park hide caption

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Scientists Say They Hope To Create A Human Genome In The Lab

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The Power Of Genes, And The Line Between Biology And Destiny

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When Erika Stallings was 22, she found out that she might have a genetic mutation that greatly increased her risk of cancer. Misha Friedman for NPR hide caption

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More People Seek Genetic Testing, But There Aren't Enough Counselors

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A lucky few stay healthy despite carrying genetic defects linked to serious diseases. What protects them? Leigh Wells/Getty Images/Ikon Images hide caption

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How Do 'Genetic Superheroes' Overcome Their Bad DNA?

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Rough night? Depending on specific tweaks to their genes, some fruit flies have trouble falling asleep, and others can't stay asleep. Getting too little shut-eye hurts their memory. David M. Phillips/Science Source hide caption

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How Research On Sleepless Fruit Flies Could Help Human Insomniacs

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The area around the confluence of the Silverthrone and Klinaklini glaciers in southwestern British Columbia provides a glimpse into how the terrain traveled by Native Americans in Pleistocene times may have appeared. David J. Meltzer/Science hide caption

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2 Gene Studies Suggest First Migrants To Americas A Complex Mix

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Mammoths had a distinctive version of a gene known to play a role in sensing outside temperature, moderating the biology of fat and regulating hair growth. That bit of DNA likely helped mammoths thrive in cold weather, scientists say. Courtesy of Giant Screen Films, 2012 D3D Ice Age, LLC/Penn State University hide caption

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Checking DNA Against Elephants Hints At How Mammoths Got Woolly

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