To study the interactions between electrons in a material, physicists have come up with a number of tricks over the years.

Given the increasing importance of rare earths, countries with large reserves are gaining significant economic and political ...

IN a former letter to NATURE (January 20, p. 79) we announced the discovery of a new element with atomic number 72, for which the name hafnium was proposed. Evidence was given that this element is ...

On 17 February 1869, Russian chemist Dmitri Mendeleev jotted down the symbols for the chemical elements, putting them in order according to their atomic weights and inventing the periodic table.

Inferences also occur between images. This is a defining element of the comics form, since, whatever else a comic might include, it must have at least two images and so some relationship between them.