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Enraptured by the idea of birdsong as music , he gained worldwide attention shortly before an untimely death . Before that he worked with the Leakeys and Don Johanson , forging an international reputation based on an unparalleled set of fossil discoveries spread across the last six million years . The Chief Disbursing Officer is , however , authorized to consider a request for waiver of this requirement in unusual circumstances where separation of duties may not be possible . His contributions to physics include the discovery of string theory , the theory of quark confinement , the development of Hamiltonian lattice gauge theory , the theory of scaling violations in deep inelastic electroproduction , the theory of symmetry breaking sometimes known as " Technicolor theory " , the first theories of cosmological baryogenisis apart from Sakharov 's work which was unknown in the west , the string theory of black hole entropy , the principle of " black hole complementarity " , the holographic principle , the matrix description of M-theory , the introduction of holographic entropy bounds in cosmology , the idea of a string theory " landscape " . The Prosobranchia only have a single set of tentacles , the eye is located at the base of the tentacle , there is a door called an operculum which can seal the animal within the shell , they breathe by gills , and the sexes are in separate animals ( bisexual ) . In the bathroom , a set of twelve-point caribou antlers doubles as a towel rack . To Apply : Please send a statement of interest in working at the Academy , complete the application form and select an advisor and project from the Summer Systematics Institute 2003 section , two letters of recommendation at least one must be from a science professor , and one set of official transcripts . There is a catalogue of Afrotropical species ( Scharff 1990a ) , and many species have been described , but no comprehensive treatment of the Afrotropical species has been published . In 1980 the American Psychiatric Association published the first set of symptom-based descriptive criteria , allowing scientists to diagnose psychiatric disorders more precisely and reliably . After the 1906 earthquake and fire , which destroyed most of the original collections of birds and mammals , the department was reborn with the resurrection of the new Academy of Sciences .