" Although supersymmetric particles have not been observed experimentally to date, the theory is one of the most popular avenues of research in theoretical particle physics. References Textbooks Griffiths, David J . (1987) Introduction to Elementary Particles, Wiley, John & Sons, Inc. ISBN 0471603864 Journal Articles Y. Hayato et al. , Search for Proton Decay through p → νK+ in a Large Water Cherenkov Detector. Phys. America Top Model Rev. Lett. "

" The record is currently held by the Volkswagen Golf which sold over 21,000,000 units and is still in production today. It was sold in the beginning at a price of $850 when competing cars often cost $2000-$3000. By the 1920s the price had fallen to $300 (about $3,300 in 2005 inflation-adjusted dollars) because of increasing efficiencies of assembly line technique and volume. On May 27, 1927, Ford Motor Company stopped manufacturing Model T cars. However Model T motors continued to be produced until August 4, 1941. Almost 170,000 motors were built after car production ceased. Many Model T parts are still manufactured today, particularly fibreglass replicas of their distinctive bodies, which are popular for T-bucket style hot rods (as immortalized in the Jan and Dean surf music song, "Bucket T", which was later recorded by The Who). Fitness Model The Standard Model of particle physics is a theory which describes the strong, weak, and electromagnetic fundamental forces, as well as the fundamental particles that make up all matter. Developed between 1970 and 1973, it is a quantum field theory, and consistent with both quantum mechanics and special relativity. "