It's only after we gave up searching for this element that we found it out in the universe.

Before we talk about one big gun, let's discuss 1,500 years of military technology.

We delve into elemental etymology today, and get to investigate a chemical phenomenon.

Today, we reach the last element on the periodic table -- but only alphabetically speaking.

Welcome to the sleepy Swedish town of Ytterby. I hope you like it, because we'll be spending an awful lot of time there later in the series.

Let's look past the bad reputation this element has to learn how it's an essential part of an idyllic childhood.

Rubidium is more explosive than the alkali metals above it on the table, but it's much more interesting when it's standing almost perfectly still.

Like argon, today's noble gas coincidentally features prominently in science fiction -- albeit in name only. But krypton also takes a place in the science factual story of international weights and measures.

Don't get too excited, because bromine is an element that brings the hammer down on both extreme emotions and extreme actions.

Throughout history, copying information has been arduous, messy, and even dangerous -- until one bored, depressed man figured out the secrets of selenium.