[PDF via NewAtlas] Inspired by some of the experiments with “ring wings” in the early 20th Century, researchers iterated on various toroidal propeller ... fabricated via 3D printing they ...

[PDF via NewAtlas] Inspired by some of the experiments with “ring wings” in the early 20th Century, researchers iterated on various toroidal propeller ... fabricated via 3D printing they ...

Unexpected circular or toroidal ordering of dipoles describes the low-temperature ground state, rather than conventional parallel or antiparallel atomic displacements. The authors have chosen lead ...