Circular logic was the wave of the future three quarters of a century ago

May1932_700.jpg

This motor-driven hoop relied on one wheel for increased efficiency and carried its single passenger at a "30-mile-an-hour clip." Steering was accomplished by leaning left or right.

Click here to enlarge

Want to keep track of the latest concept cars, automotive innovations, and more? Subscribe to Popular Science today, for less than $1 per issue!

0 Comments


138 years of Popular Science at your fingertips.

Innovation Challenges



Popular Science+ For iPad

Each issue has been completely reimagined for your iPad. See our amazing new vision for magazines that goes far beyond the printed page



Download Our App

Stay up to date on the latest news of the future of science and technology from your iPhone or Android phone with full articles, images and offline viewing



Follow Us On Twitter

Featuring every article from the magazine and website, plus links from around the Web. Also see our PopSci DIY feed


February 2012: The Future of Fun

Science is reinventing play, from extreme sports to gamification to ridiculous roller coasters to the playgrounds of tomorrow, and this issue is chock full of fun. Also, on a less fun note: Did global warming destroy my hometown?


circ-top-header.gif
circ-cover.gif