How old was the universe when dark energy began to accelerate its expansion?

Name: How old was the universe when dark energy began to accelerate its expansion?
Brand: Quizplus
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Question

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The universe was approximately 8 billion years old when dark energy began to accelerate its expansion. This period marks a significant shift from the initial deceleration after the Big Bang to an accelerated expansion, largely attributed to the mysterious force known as dark energy.

How Old Was the Universe When Dark Energy Began to Accelerate