28Entry by hagiograph
27Entry by Mattcee
It's easy to think of certain ideas as "modern." Especially if these concepts require basic innovations such as electricity.
Of course, as you're about to find out, these things aren't exclusive to us at all -- and in fact have been going on for thousands of years. Our readers compiled a list of "modern" ideas that are anything but. The winner is below, but first the runners-up ...