After the collapse of the Roman Empire, western Europe fractured into many small petty states.  A period of economic contraction coincided with a decline in learning and during the early medieval age Europe entered a nadir.  However, the church kept some form of ancient scientific thought alive and figures such as Isidore of Seville and the Venerable Bede worked to preserve this knowledge.

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Music Credit: Folk Round Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 License