Hypnotized by Elon Musk's Hyperloop
In March, 1934, Modern Mechanix reported on an unusually ambitious plan to solve Manhattan's traffic and housing woes. Norman Sper, a noted publicist and engineering scholar, proposed to plug up the Hudson River with a pair of dams at either end of the island. This would reroute the water around Harlem and the East Side, exposing the riverbed between New York and New Jersey. The resulting dry land, once filled in, would nearly double the city's size and create a gold mine in future real estate. Sper called his vision the world's eighth wonder.