1774 Joseph Priestley, English theologian, chemist and author discovers oxygen by isolating it in its gaseous state
1941 The first Jeep is produced.
1955 1st microgravity research begins
2000 First patient to receive the Jarvik 2000, the first total artificial heart that can maintain blood flow in addition to generating a pulse
1709 1st known ascent in hot-air balloon, Bartolomeu de Gusmao (indoors)
1786 US Congress adopts silver dollar & decimal system of money
1864 Comet C/1864 N1 (Tempel) approaches within 0.0964 AUs of Earth
1876 Thomas Edison is granted the patent for Autographic Printing (US Patent 180,857)
1642 Dutch astronomer Christiaan Huygens discovers Martian south polar cap
1889 William Gray patents coin-operated telephone
1913 Invention of stainless steel by Harry Brearley, Sheffield, England
1896 Dial telephone patented
1920 1st US commercial radio station, 8MK (WWJ), Detroit begins daily broadcasting
1960 USSR recovers 2 dogs, 1st living organisms to return from space
1904 Automobile tire chain patented
1924 Mars’ closest approach to Earth since 10th century
1789 William Herschel discovers Saturn’s moon Enceladus
1845 Scientific American magazine publishes its first issue
1884 First known photograph of a tornado is made near Howard, South Dakota
