Stories of turning flesh to stone — and vice versa — are common in mythology. With calcium, we see how those same transitions can happen in the real world.
There’s no avoiding discussing the banana in this episode, even though it really doesn’t deserve its strong association with Element 19.
The history of phosphorus is largely a tale of people getting their hands dirty. Very, very dirty.
From prehistoric times right through today, our hand-held tools have been made of silicon.