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New techniques may soon make designer babies a reality – are we ready?
As tests that screen embryos for complex traits become available, it's time to decide how to use these ethically – and where to draw the line
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As tests that screen embryos for complex traits become available, it's time to decide how to use these ethically – and where to draw the line
When a new group of people arrived on the Iberian peninsula 4500 years ago, local males stopped passing on their genes – suggesting they were supplanted or killed