The mouse embryos looked perfectly normal. All their organs were developing as expected, along with their limbs and circulatory and nervous systems. Their tiny hearts were beating at a normal 170 beats per minute.

Scientists grow mouse embryos in a mechanical womb

The largest of Saturn's many moons has lakes, mountains and dunes, with its surface scarred and crafted by many of the same forces which have shaped Earth, scientists said Monday.

Saturn moon Titan shaped by same forces as Earth

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Scientists grow mouse embryos in a mechanical womb

Saturn moon Titan shaped by same forces as Earth