A pristine asteroid sample that could serve as a time capsule from the early days of our solar system has finally been revealed. The rocks and dust contain water and a large amount of carbon, said ...

During the past 25 years, chemistry professor James L. Marshall of the University of North Texas, Denton, has collected pure samples of nearly all the elements from hydrogen through uranium. In ...

Element collecting can start harmlessly enough. A rainbow-hued bismuth crystal catches your eye at a science museum one day, you buy a sample or two, and the next thing you know, you’re spending ...