adate	aname
1700	sandwich
1752	electricity
1777	steam car
1781	Uranus
1795	battery
1796	Smallpox vacine
1803	atomic structure
1807	gas light
1814	steam train
1822	electromagnetics
1826	photograph
1831	cell nucleus
1836	telegraph
1846	Neptune
1859	evolution
1863	pasteurization
1869	table of elements
1876	germ theory
1879	electric light
1887	electromagnetic waves
1896	Ford car
1896	radioactivity
1900	hot dog
1903	airplane
1905	relativity
1910	radio
1921	insulin
1926	TV
1928	penicillin
1930	Pluto
1931	computer
1935	radar
1939	jet
1942	atom bomb
1944	DNA
1947	transistor
1957	Sputnik
1960	laser
1969	man on moon
1972	superconductivity
1978	personal computer
1983	genetic engineering