We're Only Beginning To Understand Why Humans Have a Skewed Sex Ratio

The ratio of newborn boys to girls slightly and consistently leans toward males: around 106 boys are born for every 100 girls. If that seems odd to you, it should: the way sperm form suggests that the ratio of X-sperm to Y-sperm should be exactly 50:50–and scientists are only now beginning to understand why the skew…

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Science gets closer to artificial life with first synthetic chromosome

Science, man. An international team of scientists have made a major breakthrough in synthetic biology. For the first time ever, they were able to insert a man-made, custom-built chromosome into brewer's yeast to not only create a life form but one that also passes down its man-made genes to its offspring. We're closer…