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In previous work, Leigh and his team created a self-tying trefoil knot and used nature as the inspiration for a synthetic version of the ribosome.

She knitted along the knotted needles and ended up with a knitted trefoil knot, the simplest knot you can tie.

A three-dimensional trefoil knot inspired by an ancient emblem of the three forces of nature — earth, air and water — is a smart choice as the übersymbol of Sustainism.