Alfred Nobel's discoveries are characteristic; powerful explosives can help men perform admirable tasks. They are also a means to terrible destruction in the hands of the great criminals who lead peoples to war.

The material constant in Curie's law is known as the Curie constant. For example a random mixture of sand in zero gravity has no dissymmetry (it is isotropic). Pierre Curie died in a street accident in Paris on 19 April 1906.

Pierre Curie (15 May 1859 – 19 April 1906) was a French physicist a pioneer in crystallography magnetism piezoelectricity and radioactivity. In 1903 he received the Nobel Prize in Physics with his wife Marie Salomea Skłodowska-Curie and Henri Becquerel "in recognition of the extraordinary services they have rendered by their joint researches on the radiation phenomena discovered by Professor Henri Becquerel".