There is a metal on the moon,
On the moon, on the moon.
There is a metal on the moon,
And it’s called samarium.

Chorus:
And it has a real long half-life,
Long half-life, long half-life.
And it has a real long half-life
Of one hundred billion years.

This isotope of samarium,
Samarium, samarium,
Decays to form an isotope
Of neodymium.

Chorus:
And it has a real long half-life
Long half-life, long half-life.
And it has a real long half-life
Of one hundred billion years.

So if you take rocks from the moon,
From the moon, from the moon.
And measure the samarium,
You’ll learn the moon’s true age.

Based on Aiken Drum
Learn more about Samarium