In 1961, the world got its first mass-produced amphibious automobile. Designed and manufactured in Germany, the Amphicar's water propulsion was provided by twin propellers mounted under the rear bumper. Despite the lack of a freeboard, two Amphicars survived 20-foot waves to cross the English Channel in 1968. Only 4,000 were ever produced.
Why it should be revived
Since the flying car forecast for the 1950s never made it into production, an amphibious car seems like a reasonable substitute.
Automakers have a long history of disastrous hookups. Now a key analyst says GM needs to cut Opel loose. Here's a look at 7 other doomed unions.