In the article about infinity, the “stereoscopic” images of tiny squares on page 140 are too far apart to view in the conventional way. However, if the viewer holds the magazine at arm’s length and looks cross-eyed at the pair, the diagonal across the square becomes visible.
Robin Frost Santa Barbara, Calif.
From the Nature Index
Subscribers, enter your e-mail address for full access to the Science News archives and digital editions.