English transcript

Again, lots of questions about what's so special

about the moon, and just wanted to say a couple words.

You know, the moon and the earth are fundamentally made

of the same material.

You know, in the way back, the earth,

the former proto-earth was hit by a Mars-sized object,

a massive collision that left lots of debris out in space

that then coalesced into what is now earth and moon.

So our whole earth-moon system literally is made

up of the same materials.

And so although earth has gone through lots of evolution

with plate tectonics and weathering, you know,

the moon has been there as a witness plate

to see everything that's happened over the, you know,

the four and a half billion years that we've been around.

So very cool.