One of the most creative thinkers of all time was Leonardo Da Vinci (1452-1519). In addition to his famous paintings like the Mona Lisa and Last Supper, Da Vinci left thousands of pages of drawings. Some of these showed designs for machines that had never existed before, including a helicopter and an oxygen tank for use by underwater divers.
In one of his notebooks, Da Vinci drew a sketch of a parachute. Next to it, he wrote that anyone using the parachute would be able to jump from any great height, without injury. This parachute was never tested during his lifetime. In fact, it took more than 500 years for someone to turn his design into reality.
In June 2000, a