In our third episode about the Periodic Table of Elements, we learned that not all elements are created equal. Sure, we knew that, but we didn't know how useless some elements out there really are (we're talking to you Einsteinium and Mendelevium). That doesn't mean that the history of how they were discovered isn't interesting!

Thankfully, we also talk about titanium and Molybdenum, which are much more useful. Take a listen to find out everything you ever wanted to know about these four elements, from how they were discovered to what they are used for, and of course, if being around them is going to kill you.