1930 - Boulder(Hoover) Dam construction begins.
This Day in History
1997 - First Mars rover Sojourner, successfully lands on the Mars surface.
1992 - Dolly the Sheep, the first cloned mammal is born
1776 - United States declares independence
2009 - University of Victoria launches Neptune Canada. An underwater observatory that provides internet access to underwater life.
1903 - Canadian Northern Railway recieves funding approval tfrom the Federal Government to build its main line.
2000- The rail and motorway bridge, Øresund Bridge, opens in Sweden.
2006- Inauguration of the Qinghai-Tibet Railway.
1928- the Goethals Bridge, a cantilever bridge in New York City, crossing the Arthur Kill Strait opens.
1989- Ground breaks on the Oriole Park at Camden Gardens, home of the Baltimore Orioles.