dark ages

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Dark Ages:

see Middle AgesMiddle Ages,
period in Western European history that followed the disintegration of the West Roman Empire in the 4th and 5th cent. and lasted into the 15th cent., i.e., into the period of the Renaissance.
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dark ages

The period between the recombination epoch and the formation of the first bright galaxies. Toward the end of this time the first generation of stars must have formed in protogalaxies, and created the first heavy elements. The absence of observable radiation renders this period ‘dark’. Only when sufficient stars or quasars have formed to reionize the intergalactic medium (as revealed by the Gunn–Peterson test) is this period observable.
References in periodicals archive ?
The Prime Minister of the United Kingdom has taken time off from ushering in a new age of darkness to give the BBC his football tips for this week.
Moreno We know and love you because you represent amor y paz in an age of darkness when things fall apart and the world craves the truth of our existence.
If we forget the lessons of history, we will be replacing the Era of Enlightenment with an Age of Darkness.