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At the Edge of Time: Exploring the Mysteries of Our Universe’s First Seconds (Science Essentials Book 32), by Dan Hooper

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The temperature of this radiation—known as the cosmic microwave background—is currently a frigid 2.728 degrees above absolute zero, or about 455 degrees below zero Fahrenheit.
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At the Edge of Time: Exploring the Mysteries of Our Universe’s First Seconds (Science Essentials Book 32)
At the Edge of Time: Exploring the Mysteries of Our Universe’s First Seconds (Science Essentials Book 32)
by Dan Hooper
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