Today we all feel a little more alone. Goodbye Professor

Stephen Hawking, the scientist who revolutionized theories about the universe, left us at the age of 76. Cosmologist, physicist, mathematician, astrophysicist, he has easily explained his studies on black holes, on quantum cosmology and on the origin of the universe, reaching people's hearts. "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge". Today we all feel a little more alone. Goodbye Professor.