THERE are few fallacies which have done more to mislead the unscientific public than the misconception known as the fourth dimension. The use of this term is calculated to convey the false impressions ...

THE fourth dimension and non-Euclidean geometry have achieved a prominence quite unprecedented for mathematical topics. In train, bus and tram, over lunch and at the theatre, intelligent man is ...

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...