(Marked in Fig. 1 by a shorter bar). The rest of about 45 elements are found in small quantities in nature and they are more or less of scientific interest, the decorative stones of the universe ...

The conclusion in 1902 by Sir Ernest Rutherford and myself with regard to the element thorium was of this ... has actually been crossed by science. The first phase of the study of radio-active ...

Many scientists worked on the problem of organizing the elements, but Dmitri Mendeleev published his first version of the periodic table in 1869, and is most often credited as its inventor. Since then ...

Transposable elements, or "jumping genes", were first identified by Barbara McClintock more than 50 years ago. Why are transposons so common in eukaryotes, and exactly what do they do? In addition ...