THIS is an interesting contribution to the subject treated of by Riemann, Helmholtz, and others, and in this country by Prof. Clifford. The question is considered from the standpoint of elementary ...

All human beings may have the ability to understand elementary geometry, independently of their culture or their level of education. In a spherical universe, researchers found that Amazonian Indians ...

I HAVE to thank the Editor of NATURE for inserting my letter, and Mr. Wilson for writing so fully. I was not aware when I wrote, that Mr. Wilson had himself published an elementary book on geometry.

How can the behavior of elementary particles and the structure of the entire universe be described using the same mathematical concepts? This question is at the heart of recent work by the ...