Main Page | See live article | Alphabetical index 1907 in science and technology See also: 1906 in science, other events of 1907, 1908 in science and the list of years in science. Table of contents 1 Chemistry 2 Geology 3 Physics 4 Psychology 5 Medicine 6 Technology 7 Nobel Prizes 8 Births 9 Deaths Chemistry Emil Fischer artificially synthesizes peptide amino acid chains and thereby shows that amino acids in proteins are connected by amino group-acid group bonds Georges Urbain discovered Lutetium. From Lutetia (ancient name of Paris). Geology Bertram Boltwood proposes that the amount of lead in uranium and thorium ores might be used to determine the Earth's age and crudely dates some rocks to have ages between 410--2200 million years Physics Albert Einstein introduces the principle of equivalence of gravitation and inertia and uses it to predict the gravitational redshift Psychology Ivan Pavlov demonstrates conditioned responses with salivating dogs Medicine Paul Ehrlich develops a chemotherapeutic cure for sleeping sickness Technology Lee DeForest invents the triode thermionic amplifier, starting the development of electronics as a practical technology. The Autochrome Lumière is the first color photography process marketed. Nobel Prizes Albert Abraham Michelson is awarded the Nobel Prize for Physics Eduard Buchner is awarded the Nobel Prize for Chemistry Charles Louis Alphonse Laveran is awarded the Nobel Prize for Medicine Births July 7 - Robert Heinlein, future science fiction author Deaths January 20 - Dmitri Ivanovich Mendeleev, chemist This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.