Chalk up a success

October 15, 2009

The article "'Our fate was in our hands'" (1 October) failed to stress an important point - that theorists used to communicate with each other while standing in front of a blackboard.

Do they still do this, or has the blackboard been replaced? If so, is the replacement as efficient as the original device - that is, two or more scientists in front of the same blackboard?

Lewis Elton AcSS, University College London.

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