# rotation

The laws of symmetry are unforgiving, but a team of researchers from the US have come up with a pattern-producing technique that seems to cheat them. The new technique is called |
Some molecules - thalidomide, for example - come in both left and right handed versions, while others are indistinguishable from their reflections.
Plus finds out about the role of mathematical symmetry in chemistry. |

Four mathematicians have finally confirmed that the familiar double soap bubble is indeed the best way to enclose two separate volumes of air. |