Meet 'Big Mo' - Moustafa Ismail - who has broken the world record for having the largest biceps and triceps in the world - with a circumference of 25.5in.
The Egyptian-born bodybuilder eats as much as 3lbs of chicken, 1lb of steak or fish and four cups of almonds a day.
Also on the Guinness World Records list is Zeus, the three-year-old Great Dane, who measuring an impressive 44in from foot to withers, is the world's tallest dog.
Archie, the 29-month-old Dexter breed bull, owned by a County Armagh-based farm, is the world's smallest bull, measuring just 76.2 cm (30in).
Farmer's son Ryan Lavery, 15, bought Archie at five-months-old and admits that the bull's fate would have been different if he had been of a normal stature.
Ryan said: "His size saved his life and now he's going to live out the rest of his life as a pet. It's brilliant and amazing to have Archie in the new Guinness Worlds book."
Other records go to 86-year-old Johanna Quaas, a retired PE teacher from Leipzig, Germany, who is the world's oldest gymnast.
London-based sumo wrestler Sharran Alexander, who weighs 203.21 kg (32 stone), has been named the world's heaviest sportswoman.
Finally, the world's tallest mohican belongs to Japanese designer Kazuhiro Watanabe’s - whose spear-like hairdo peaks at more than 3ft 8in.
Being published in 22 languages in more than 100 countries, the 2013 Guinness World Records is expected to sell around 2.7 million copies.