Clay Halton was a Business Editor at Investopedia and has been working in the finance publishing field for more than five years. He also writes and edits personal finance content, with a focus on ...

One evening in the early 1970s, Michael Pachovas and a few friends wheeled themselves to a curb in Berkeley, Calif., poured cement into the form of a crude ramp, and rolled off into the night. 1 For ...