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Genes & Cells

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IN WITH THE NEW  One technique to replace faulty mitochondria in egg cells has resulted in the birth of a healthy baby boy. The five-month-old is the first “three-parent baby” born using the spindle nuclear transfer procedure.

human embryo

EDITS UNDER WAY  Researchers in Sweden have begun editing genes in viable early human embryos (four-cell stage, shown). Others are probably doing the experiments behind closed doors, scientists say.

peanut butter and jelly sandwich face down on the floor

DON’T EAT THAT  Wet foods that fall on the floor pick up bacteria quickly, a new study suggests.

Genes & Cells

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