The mass of the antileptons is identical to that of the leptons, but all of the other properties are reversed. A third characteristic feature of leptons, in addition to their charge and mass properties, is their intrinsic angular momentum, or spin. Leptons are classified within a larger group of subatomic particles, the fermions, which are characterized by half-integer values of their spin.
Trick and Treat: Halloween in Italy. 28th October 2015. Itâs nearly that spooky time of year again. Although Halloween is renowned around the world as a holiday loved by the Americans (their holidays are celebrated bigger and better than anywhere else) it is becoming more and more popular in Italy.
Halloween is a secular holiday combining vestiges of traditional harvest festival celebrations with customs more peculiar to the occasion such as costume wearing, trick-or-treating, pranksterism and decorative imagery based on the changing of the seasons, death, and the supernatural. Halloween takes place on October 31.