Aug. 6, 1913: Scientists thought they discovered Coronium, an element weighing less than hydrogen. The gas, discovered during a total solar eclipse, was to be produced on Earth, and, if successful, would change our relationship with the planets. “When the earth becomes too cold for human habitation the people could move in airships to any planet that might strike their fancy. That would be unnecessary for a million years or more." The scientists actually saw highly ionized iron and nickel.