The periodic table is one of the greatest achievements in scientific history, a tool that has transformed chemistry from an ...

The Laboratory in Blue Prince is home to two puzzles: the periodic table puzzle and the machine puzzle. Both puzzles are ...

So why do so many life-forms breathe oxygen? There are probably thousands of kinds of metabolisms, or chemical processes that maintain life, said Donald Canfield, a geobiologist at the University of ...

These are almost one-quarter of the periodic table and are mainly found in the first four periods. Of these, 11 are essential elements that our bodies need in larger amounts: oxygen, carbon ...