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An investigator "with a bit of free time" decided to send for testing DNA samples from a long-dormant cold case, which led authorities to arrest a pair of…
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It ought to be possible to compare the DNA of a random individual with DNA from around the world to make a call on ethnicity, but there are problems with tests of this kind, says commentator Alva Noë.
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Think of family trees and you probably think of dusty letters and black-and-white photos of great-grandparents. The latest trend, though, is using DNA testing to explore your ancestry.
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Companies are assembling and churning out tailored stretches of DNA faster and more cheaply than ever before. The tool speeds research into diseases of plants and people. But what about eugenics?