Period in example sentence

And we go through a period of accelerating expansion, and the universe expands and cools until it gets to the point where it becomes transparent, then to the Dark Ages, and then the first stars turn on, and they evolve into galaxies, and then later they get to the more expansive galaxies.

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Chauvet caves are about 32,000 years old, along with a few small, realistic sculptures of women and animals from the same period.

And if tempers are still too high, then they send someone off to visit some relatives, as a cooling-off period.

The tricky thing is that these harsh chemicals are really effective at keeping a garment a specific color for a long period of time.

The 200,000-year period in which men have been top dog is truly coming to an end, believe it or not, and that's why I talk about the "end of men."

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