Adrian Nicholas (4 March 1962 – 17 September 2005) was a British skydiver who completed more than 8,000 jumps in 30 countries.He is best known for his successful test in July 2000 of Leonardo da Vinci's (1452–1519) parachute design, proving it to be in retrospect the world's first working parachute. A modified pyramidal design was later also successfully tested by his Swiss colleague Olivier Vietti-Teppa.