Anyone trying to refold an opened road map is wrestling with the same sort of challenges confronted by origami designers and sheet metal benders.
The problem of returning a creased sheet to its neatly folded state gets tougher when you’re not sure if the sheet can be folded into a flat packet and when you’re not permitted to change the crease directions.
Log in
Subscribers, enter your e-mail address for full access to the Science News archives and digital editions.