1752 Benjamin Franklin proves lightning is electricity – there’s a Disney film (20mins) about him here.
1878 Eadweard Muybridge photographs a horse running, showing all its feet leaving the ground
2012 Nik Wallenda tightrope-walks over Niagara Falls
Global Wind (Energy) Day – so build a wind turbine.
Other events today:
Day of Valdemar and Reunion day (Denmark – celebrates Valdemar II’s victory against Estonia in 1219, when Denmark’s flag fell from the skies. Also in 1920 Sønderjylland was reunited with the rest of Denmark.) See 5th June.
Arkansas Statehood Day: Johnny Cash was from here.