Wednesday, October 4


'Ancient light' takes Nobel Prize The CMB has been called the "echo" of the Big Bang - the event that created the Universe less than 14 billion years ago.
It is the radiation that formed when the Universe had cooled to such a degree that hydrogen atoms could exist. Before that time, scientists say, the Universe would have been so hot that matter and radiation would have been "coupled" - it would have been opaque. BBC

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