T-Rex: T-Rex presents The Periodic Table:
T-Rex: 58 CERIUM
T-Rex: The first (non-lanthanum) lanthanide element, and a rare-earth metal. But it's not rare at all! It's 5 times as abundant as lead and almost as common as copper in Earth's crust.
Utahraptor: Yet, I know absolutely zilch about it!
T-Rex: It's a byproduct of extracting useful elements from the earth.
Utahraptor: But why is there so much of it?
T-Rex: You mean...
T-Rex: Why so cerium??
The author writes:
Continuing the Batman theme into a third day...
But yeah. Cerium is as abundant as copper, but how many facts do you know about cerium??