Popularising mathematics requires a preliminary reflection on language and terms, the choice of which results from underlying dynamics. The aim of this article is to start an overall analysis of the conditions influencing this linguistic choice.

According to Einstein's renowned declaration, for those who believe in physics ­ or, more precisely, in its capability to offer a "scientific" representation of the world ­ the distinction between present, past and future is just "an illusion, though obstinate". If we consider an effective analogy by Mauro Dorato, we can state that those who agree with the famous German scientist will recognize in the present, past and future a relationship very similar to that between "here" and "somewhere else" ­ in other words, the present is just a located moment and has no privileged status.

"I consider Leopardi's poetry and pessimism to be the best expression of what a scientist's credo should be". This quotation is from Bertrand Russell, no less. With these very emblematic words, the greatest man of letters, the supreme icon of the Italian Parnasse, the author of such collections of poems as Canti (Poems) and Operette Morali (The Moral Essays) and philosophical thoughts as Zibaldone (Miscellany) has been associated to the world of science. This relationship, very intense and to a certain extent new, was greatly emphasised on the occasion of the poet's birth bicentenary. During the celebration in 1996, an exhibition with the name of Giacomo and Science was organized in his birthplace to underline the close connection between the poet and the scientific culture of his epoch. This point has also been stressed recently.

Ever since Galileo's time, scientists have been interested in how to create a perfect language capable of supporting communication at a horizontal level i.e. within the scientific community, and at a vertical level, i.e. between scientists and the public. Special attention will be spent on the mathematicians' role, especially Giuseppe Peano's. The Italian mathematician played a leading role in the creation of a perfect language, both at a horizontal and a vertical level. On the one hand, there is his successful attempt to introduce a standard logical and symbolic system of notation, which became essential for communication among mathematicians. On the other hand, there is the complete failure of his ambitious Latino sine flexione (Latin without inflection), a perfect language which died with its creator.

This paper describes how a universal language for notating dance and, more generally, movement was elaborated, known as "Kinetography Laban", or rather "Labanotation". It was devised by choreographer and movement theorist Rudolf von Laban, who outlined it for the first time in 1928, in the journal Schrifttanz. His system differs from precedent notation systems in that Labanotation is rigorous and universal, as it is based not on one particular style or technique but on the general

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