August 15, 293 BC – The oldest known Roman temple to Venus is dedicated.August 16, 1960 – Joseph Kittinger parachutes from a balloon over New Mexico at 102,800 feet (31,300 m), setting three records that still stand today: High-altitude jump, free-fall, and highest speed by a human without an aircraft.
August 17, 1807 – Robert Fulton's North River Steamboat leaves New York City for Albany, New York on the Hudson River, inaugurating the first commercial steamboat service in the world.August 18, 1868 – French astronomer Pierre Jules César Janssen discovers helium.
August 19, 1960 – Sputnik program: Sputnik 5 – the Soviet Union launches the satellite with the dogs Belka and Strelka, 40 mice, 2 rats and a variety of plants.
August 20, 1920 – The National Football League, (NFL), is founded in the United States.August 21, 2007-Space Shuttle Endeavour lands safely at Kennedy Space Center at 12:32:29 EDT (16:32:29 UTC).
