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  Leonardo da Vinci A genius , architect, painter, theorist,  engineer  and scientist   Leonardo da Vinci An actor, architect, painter, theorist and scientist born in 1452 His notebook on which he worked on different subjects, Astronomy, botany, painting and cartography. Most of the time of his life he stayed in Florence, where he was successful to attract many students and imitators. Throughout his life he achieved admiration and followers. He was also considered one of the founders of renaissance. His most influential paintings were The Last Supper, Vitruvian Man, magnum opus, and Mona Lisa. His most expensive painting was Salvator Mundi sold in US $450.3. Leonardo earliest work was on Arnno valley painting where he first time talk about Arno River between Florence and Pisa. 1478-81 Leonardo was sent as an ambassador to Ludovic il Moro by Lorenzo de Medci. Leonardo made many sketches and detailed drawings of all things that took his attention. Most import...

  Abdul Qadeer Khan   Khan was born in 1936, a renowned physicist and father of Pakistan’s atomic weapons program. He migrated from India to Pakistan in 1952.Khan in 1972 joined Physics Dynamics Research Laboratory in Amsterdam. This laboratory was working on uranium enrichment plant. When he was to left he was offered senior technical position. When India did surprise nuclear test in 1974, Pakistan team under Munir Ahmad Khan was working on atomic bomb.   Khan was trying to build an atomic bomb and held meeting with Pakistani officials in 1974.He wrote letter to Prime Minister Zulifiqar Ali Khan. When Khan comes in Pakistan he took a taxi and went to PM secretariat. He held meeting with Prime Minister and President and explained thoroughly about enriched uranium, in the end of the meeting Bhutto remarks were He seems to make sense. The next day, Khan met with Munir Ahmad and other senior scientists where he focused the discussion on production o f enriched uranium....