A look at how our quest to understand what everything is made of connects to the periodic table and the history of science.

You can get a good idea of what the current state of the planet is by looking at yttrium. When China's President Xi Jinping and U.S.

Editor’s note: Today, we begin a new, periodic feature. We’ll spend part of our Saturday visiting a local restaurant, cafe or coffee shop and talking to guests. We’ll share our experience and their ...