• fckreddit@lemmy.ml
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        8 months ago

        Ferrous means iron. When they say Ferrous wheel, it means how the iron is stored and used in the biosphere and lithosphere. It is a pun on Ferris Wheel, which is an amusement park ride.

      • acockworkorange
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        8 months ago

        Google Ferris wheel. The London Eye is an example of a Ferris wheel.