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October 2012 Volume 8 No 10

Chirality is usually manifested by differences in a material's response to left- and right-circularly polarized light. This difference is the result of the specific distribution of charge within chiral materials. A similar response has now been found to result from the chiral spin structure of an antiferromagnet. Letter p734

COVER IMAGE: DAVID SZALLER AND ISTVAN KÉZSMÁRKI

COVER DESIGN: ALLEN BEATTIE