If its start and end are defined using mean solar time then due to the extreme length of day variation this is the longest year of the Julian calendar or Gregorian calendar, having a duration of 31622401.38 seconds of Terrestrial Time (or ephemeris time).[1]
June 30 [O.S. June 17 ] – Tunguska event in Siberia, an explosion believed to have been caused by the air burst of a large meteoroid or comet fragment at an altitude of 5–10 kilometres (3–6 mi) above the Earth's surface.[2][3][4]
G. H. Hardy and Wilhelm Weinberg independently formulate the Hardy–Weinberg principle which states that both allele and genotype frequencies in a population remain in equilibrium unless disturbed.[6] proposes that genetic defects cause many inherited diseases.
History of science
Site of Ulugh Beg Observatory located in Samarkand by Russian archaeologist V. L. Vyatkin.
Josip Plemelj solves the Riemann problem about the existence of a differential equation with a given monodromic group and uses Sokhotsky-Plemelj formulae.
Austrian American pathologist Leo Buerger gives the first accurate pathological description of Thromboangiitis obliterans ("Buerger's disease") at Mount Sinai Hospital (Manhattan).[10]
Victor Horsley and R. Clarke invents the stereotactic method.
Margaret Reed Lewis, working in Berlin, becomes probably the first person successfully to grow mammalian tissue in vitro.[11]
Technology
January 12 – A long-distance radio message is sent from the Eiffel Tower for the first time.
Henry Ford develops the assembly line method of automobile manufacturing and produces the first Model T automobile.
^Pasechnik, I. P. (1986). "Refinement of the moment of explosion of the Tunguska meteorite from the seismic data". Cosmic Matter and the Earth (in Russian). Novosibirsk: Nauka. p. 66.
^Kuhn, R. (2004). "Eugen Bleuler's concepts of psychopathology". History of Psychiatry. 15 (59 Pt 3): 361–6. doi:10.1177/0957154X04044603. PMID 15386868.
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