- 1769 The de Portolá Expedition establishes a base in California and sets out to find the Port of Monterey (now Monterey, California)
- 1845 First postmasters' provisional stamps issued in New York City
- 1850 First public demonstration of ice made via refrigeration by Florida physician John Gorrie
- 1864 Gold is discovered in Helena, Montana
- 1868 Alvin J. Fellows of New Haven, Connecticut, patents the tape measure
- 1886 The Temple Street Cable Railway begins cable car service in Los Angeles, California
Liquid-Fueled Rocket
1914 American engineer Robert Goddard is granted the first patent for liquid-fueled rocket design
- 1914 Rolex receives the first wristwatch Class 'A' certificate from Kew Observatory
- 1927 First commercial airplane flight in Hawaii
- 1934 The New York Times erroneously declares Babe Ruth's 700 home run record to stand for all time
- 1940 Due to beanball wars, Spalding advertises batting helmets with earflaps
- 1951 First color telecast of a sporting event (CBS - horse race)
- 1952 American ocean liner SS United States crosses Atlantic Ocean, returning to New York in a westward record time of 84 hours and 12 minutes [1]
- 1962 Borehole for Mont Blanc tunnel finished
- 1969 The United States $500, $1,000, $5,000, and $10,000 bills are officially withdrawn from circulation
- 1983 Mario Bros. is first released by Nintendo in Japan as an arcade game featuring an Italian-American plumber
Radio Station Tries to Find Elvis
1988 WYHY radio offers $1 million to anyone who can prove Elvis is still alive
- 1996 NY Yankees sweep complete season series in Baltimore for first time
- 2014 The Church of England votes in favor of allowing women to become bishops
- 2015 Scientists from the Large Hadron Collider announce the discovery of a new particle called the pentaquark
- 2018 Huge iceberg looming over Innaarsuit village, western Greenland prompts evacations in case it calves
- 2020 New study shows Andean condor, world's heaviest bird, can fly for 5 hours without flapping its wings (Proceedings of the National Academy of Sciences)
