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The Universe is Expanding Faster These Days and Dark Energy is Responsible. So What is Dark Energy?

February 5, 2024
Some 13.8 billion years ago, the universe began with a rapid expansion we call the big bang. After this initial expansion, which lasted a fraction of a second, gravity started to slow the universe down. But the cosmos wouldn’t stay this way. Nine billion years after the universe began, its expansion started to speed up, […] Read more
Reading level: College
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