Earth once had a second moon

Posted by Kate Taylor
The Earth once had two moons circling in the same orbit, say scientists, until a collision between the two created the moon we see today.
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Women? Who needs 'em...?

Posted by Emma Woollacott
We women can no longer take comfort from the fact that we'll always be necessary for the reproduction of the species: geneticists have succeeded in creating viable male and female mice from two fathers.
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