Historians link trick-or-treating to a few different ancestors, some old and some new.
The chemical symbol for oxygen is O. Makes sense. Calcium gets repped by a Ca. Sounds good. Hydrogen? H. Cobalt? Co. Lithium? Li. With you so far. Lead? Pb. Stop the presses!
Magicians have been practicing their craft for ages, but what’s the first magic trick that was recorded for posterity?
Matt Soniak answers today's Big Question.
There more than 100 bodies of water in the world that are either officially named seas or commonly referred to that way.
Here’s what you need to know about the toxin everyone is talking about.