That’s So Metal

The human body is 2.5% metal, which we need in order to produce electricity, heal our skin, and make us move and think, among other things. We're not saying we're robots, but we're sort of robots. This week we dive into the weird world of metals, and how exactly our bodies need and use them to pilot the other 97.5% of us that's an organic, goopy pile of flesh and guts.