Science and technology in Argentina Argentina have enjoyed an international respect since the turn of the 1900s, when Dr. Luis Agote devised the first safe and effective means of blood transfusion as well as René Favaloro, who was a pioneer in the improvement of the bypass surgery . Argentina is the Latin American country with the most Nobel Prize laureates; and has three Nobel Prize winners in the sciences: Bernardo Houssay in Physiology or Medicine in 1947, Luis Federico Leloir in Chemistry in 1970, and César Milstein in Physiology or Medicine in 1984. Dr. Domingo Liotta created the first artificial heart in 1969, revolutionizing the
MD Helicopters MD 500 in 1953. Images and analyses done regarding North Korea's MD 500 helicopters show that they have been modified significantly to serve as light attack helicopters, such as modification work on the helicopters for them to be mounted with Soviet-designed AT-3 Sagger anti-tank wire-guided missiles. The MD 500 is widely operated by private individuals, companies and law enforcement agencies around the world. MD Helicopters MD 500 The MD Helicopters MD 500 series is an American family of light utility civilian and military helicopters. The MD 500 was developed from the Hughes 500, a civilian version of the US Army's OH-6A Cayuse/Loach.