1967- Construction began on the Calgary Tower, a $3.5-million-dollar project in Alberta, Canada.
https://youtu.be/ITXvV-ADvMw
https://youtu.be/lJr_qw38X-c
https://m.youtube.com/watch?v=w2vMq8hjif4
https://youtu.be/t9tQ1-wCUBw
https://m.youtube.com/watch?v=BgN-1cQzbRM
1745- Inventor of the battery, Alessandro Volta, is born.
https://m.youtube.com/watch?v=izfPNGVnr_4
https://youtu.be/9F5R4eE8iCo
https://youtu.be/A6Y0GzpwClc