Science: Solid Space?

Last week a vital, thick-set man with hair ruffled by nervous fingers, lectured in German and chalked hieroglyphics on a lecture room blackboard at University College, Nottingham, England. The Nottingham faculty and many a distinguished guest sat and listened intently, though only three of them could begin to comprehend the discourse. When the man finished they asked him to autograph the blackboard. He complied. Then the wise men of Nottingham had the blackboard varnished and stored away as a memento. The name scrawled on it is Albert Einstein.

The varnished figures represent...

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