According to Alemi and Stevenson, in models of the early solar system it is nearly impossible for Venus to avoid a big hit. Most likely, Venus was slammed early on and gained a moon from the resulting debris.
The Golden Gate Bridge was built simply, to connect San Francisco to Marin County. The San Francisco Bay has rough currents and ferries were the only way to get across. Building a bridge just made it easier.
Not any more. The 4,200-foot long suspension span of the Golden Gate Bridge was the longest span in the world from the time of its construction in 1937 until New York City's Verrazano Narrows Bridge was opened on November 21, 1964.It is 60 feet longer than the Golden Gate Bridge.The Verrazano was the longest single span bridge until July 17, 1981, when the Humber Bridge in England, spanning the Humber River, was opened for traffic with a main span of 4,626 feet.he fabricated steel used in the construction of the Golden Gate Bridge was manufactured by Bethlehem Steel in plants in Trenton, New Jersey and Sparrows Point, Maryland and in plants in three Pennsylvania towns: Bethlehem, Pottstown, and Steelton.