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fertilized human eggs and embryos

IN GOOD REPAIR  CRISPR/Cas9 has corrected a gene defect in fertilized human eggs (left) without hampering embryo development. Four-cell embryos (middle) and blastocyst-stage embryos — about five days old — (right) carrying the CRISPR/Cas9 gene editor appear normal.


SWEET SCENT  A protein called PhABCG1 moves scent compounds out of petunias’ cells, helping the flowers to smell sweet.

mouse skeleton x-ray

BONE UP  The skeleton doesn’t just protect important bodily organs, it also talks to them, studies in mice show.

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