The mice the two independent labs used were several generations distant from the original strain or grown from preserved embryos, and in that interval, any number of changes could have happened in gene sequences or to affect how the animal uses the gene.

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The greater the interval between menarche and menopause, the greater the number of menstrual cycles with spikes in exposure to these hormones.

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Carter, the world number 15, pulled a frame back just before the interval to make it 3-1, but gifted his opponent too many opportunities to win another.

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That number, delivered under such circumstances, would be negligent in its cruelty. (I write about the long history of hiding cancer diagnoses in a previous post.) Her brain, I imagine, quickly recalculated his odds in that brief interval of panic, when she realized he was insisting on getting a number out of her.

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The new number, the agency said, is "not significantly different" and continues to fall within the confidence interval established earlier.

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