The world's largest biceps belong to Mostafa Ismail (Egypt) and were measured for left arm flexed at 64.77 cm (25.5 in) and non-flexed 62.23 cm (24.5 in) and for right arm flexed at 63.5 cm (25 in) and non-flexed 60.96 cm (24 in). The measurements were taken in Franklin, Massachusetts, USA which is where Mostafa now resides.
The 57th edition of the world's best-selling copyright book, Guinness World Records, is out today (13 September 2012).
Picture: Guinness World Records/PA
The oldest gymnast is Johanna Quaas (b 20 November 1925, Germany) who, at the age of 86 years, is a regular competitor in the amateur competition Landes-Seniorenspiele, staged in Saxony, Germany. She performed a floor-and-beam routine on the set of 'Lo Show dei Record' in Rome, Italy.Picture: Guinness World Records/PA
The tallest mohican measures 113.5 cm (44.68 in) and belongs to Kazuhiro Watanabe (Japan). The length was verified at Bloc de l'art hair salon, Shibuya, Tokyo, Japan. Picture: Shinsuke Kamioka/Guinness World Records
The tallest living dog is ‘Zeus’ (USA) a Great Dane, who measured 1.118 m (44 in) tall and is owned by Denise Doorlag and her family, of Otsego, Michigan, USA.Zeus also takes over the 'Tallest dog ever' title from previous holder 'Giant George'. Picture: Guinness World Records/PA
The tallest living horse is Big Jake, a nine-year-old Belgian Gelding horse, who measured 20 hands 2.75 in (210.19 cm, 82.75 in), without shoes, at Smokey Hollow Farms in Poynette, Wisconsin, USA. Picture: Kevin Scott Ramos/Guinness World Records
The shortest bull is Archie, a 16-month-old Dexter Bull, fully registered in the Northern Ireland livestock inventory, in County Antrim, Northern Ireland, who measured 76.2 cm (30 in) from the hoof to the withers. Picture: Guinness World Records/PA