Some inventions are world-altering. Some are curiosities. Some will be relevant to only a few of the Earth's humans. And some are just so absurd that they raise serious questions about the mental competence of their inventors.
Maria Popova, of the always wonderful Brainpickings, has collated 27 of the strangest of this last breed. Highlights include the amphibious bicycle (1932) for the gent that's too busy to look for a bridge, wooden women's bathing suits (1929) for the lady who wants to look like she's exploding out of a barrel, all the time, and the radio hat (1931) for anyone who wants to look utterly insane. The ingenuity of man truly knows no bounds.