"" "Glamour modeling" usually includes elements of nudity or eroticism, while "nude modeling" describes any kind of modeling that is performed without clothes. Art school modeling (usually figure drawing or sculpture) involves posing for students of art . Some models specialize in having a particular portion of their body photographed, usually for advertisement purposes; thus "leg models" advertise hosiery, "hand models" advertise nail polish or gloves, et cetera. For notable models, see supermodel and glamour photography. Some people who are better known for other accomplishments have also worked as professional models: 1908 Ford Model T advertisement Ford Model T used for giving tourist rides at Greenfield Village 1925 Ford “New Model� T Tudor Sedan The suspension components of a Ford Model T For the blues musician, see T-Model Ford. The Model T (colloquially known as the Tin Lizzie and the Flivver) was an automobile produced by Henry Ford's Ford Motor Company from 1908 through 1928. The first production Model T was built on September 27, 1908 at the Piquette Plant in Detroit, Michigan. Teenage Male Model Cars built before 1919 are classed as veteran cars and later models vintage cars. There were several cars produced or prototyped by Henry Ford from the founding of the company in 1903 until the Model T came along. "

" The so-called grand unified theories (GUTs) hypothesized that the SU(3), SU(2), and U(1) groups are actually subgroups of a single large symmetry group. At high energies (far beyond the reach of current experiments), the symmetry of the unifying group is preserved; at low energies, it reduces to SU(3)×SU(2)×U(1) by a process known as spontaneous symmetry breaking. The first theory of this kind was proposed in 1974 by Georgi and Glashow, using SU(5) as the unifying group. A distinguishing characteristic of these GUTs is that, unlike the Standard model, they predict the existence of proton decay. In 1999, the Super-Kamiokande neutrino observatory reported that it had not detected proton decay, establishing a lower limit on the proton half-life of 6. 7× 1032 years. This and other experiments have falsified numerous GUTs, including SU(5). Become Male Model Another effort to address the first defect has been to develop Preon models which attempt to set forth a substructure of more fundamental particles than those set forth in the Standard Model. In addition, there are cosmological reasons why the standard model is believed to be incomplete. "