https://youtu.be/eE1MXmkcsM4
Jun
15
Jun
15
https://youtu.be/UadCe6skSsk
Jun
15
1970- the Ketelbrug, a bascule bridge, opens across the Ketelmeer in the Netherlands.
Jun
14
https://youtu.be/b-H7E-KQgHQ
Jun
14
https://www.youtube.com/watch?v=kBdrzCrKE6U
Jun
14
1834- Sandpaper is patented by Isaac Fischer Jr
Jun
13
https://youtu.be/M9GYlBmUMnA
Jun
13
1955- Discovery of diamond-bearing deposits at the Mirny Mine in Russia
Jun
12
https://youtu.be/UCcDVyaXRFQ
Jun
12
https://youtu.be/OjGkrwP7DMc