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The Rose Field refers to a magnetic or gravitational field, and was mentioned in the opening chapters of Northern Lights, when scholars at Lyra's Oxford college secretly discussed a mysterious phenomenon called Dust.

Islanders in the Outer Hebrides say their lives are being disrupted by a mysterious low frequency humming sound that can be heard day and night.

Far too much smart-people thought has been expended on the relationship between Trump and Putin; I've never found it mysterious and see no need for conspiracy theory.

The details of the killing are tragic, but don't seem mysterious.

Vladimir Putin initially denied having anything to do with Russia's capture of Crimea in February 2014, when mysterious masked commandos in unidentified green uniforms seized the local parliament and fanned out across the peninsula.