The question of where eddies come from is immortalized in verse, and an earwig emerges remarkably unscathed from inside a vacuum tube, in this week’s peek at Nature’s archive.

The small-bandgap semiconductors LnCd 3 P 3 (Ln = La, Ce, Pr and Nd) are promising materials to study emergent phenomena from geometric frustration across bond, spin and charge degrees of freedom.