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19038
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 FrostSanta Barbara, Calif.
- Math
Infinite Wisdom
A mathematician has proposed a new approach to resolve a long-standing question about infinite sets of numbers.
- Tech
Mind-Expanding Machines
Researchers have designed computer systems aimed at amplifying human thought and perception, such as a new type of cockpit display for aircraft pilots that exploits the power of peripheral vision.
