These retro concept cars depict a forgotten future

Fancy a motorbike in the shape of a car? An electric egg? Check out some of these long-lost concepts that show a hopeful view of the future from our past.

Ghia 'Gilda' Streamline X (1955)

Hear that whir? Designed by Giovanni Savonuzzi, the car uses a gas turbine engine. It has no pedals (drivers use a central stick to control forward and backward motion), sounds like a plane taking off, uses kerosene as its fuel, and looks vaguely like an electric shaver. The California-based Blackhawk Museum has a great video of the Streamline in action.