Scientists are claiming that they have found chunks of the small planet Theia that collided with the Earth to form the Moon in our mantle. Apparently it did not completely melt when it collided with the Earth however there are other theories out there as to what those chunks might be.
Can you imagine if we actually collected samples?
Stranger
How would they get a sample?
I thought the deepest manmade bored hole is in Russia and it’s only 40,230 feet deep (a little over 7 miles). (Kola Superdeep Borehole.) Theia is supposedly 1,800 miles down.
https://www.cnn.com/2023/11/03/world/earth-moon-theia-collision-llvps-scn/index.html
If the Moon is in our mantle we have bigger concerns than mere Theia chunks. 
It’s hard to write a sentence like that with so many modifiers and subjects and third persons without getting at least one of them floating out there where it doesn’t quite fit.
Silly pedantic nitpicking aside, that would be really cool if there really are Theia chunks in the mantle. I’m sure there’ll be a lot of remote sensing “exploring” going forward using seismic means.
Send Bruce Greenwood and Hillary Swank of course:
^^^I remember that movie 
That’s how they found these two anomalies; seismic waves travel differently through them. The real question is why the two anomalies are there.
In an interesting kinda-related development, I ran across this research article today.
The article’s baseline and conclusions are a bit confusing, but appears to be legit research, not dumbed-down clickbait.
What the moon was doing in our mantle, I’ll never know! waggles cigar
Are we sure this isn’t @Hatchie’s doing?
The “much older” part is kinda clickbaity. We are talking 4.46 billion years old versus 4.42 billion. Less than one percent difference. Every radiometric dating method has an error bar, this is just narrowing it slightly.
So if I’m reading the article correctly, we already knew about these “blobs” in the mantle for a long time now. And this is just one scientist going “hey, this could be Theia. But we really have no way of proving if it is.”
Maybe we can’t today but who knows by 2027 or 2028.
I notice you didn’t say “fondly.”
I don’t normally (meaning ever!) link to my posts but this is important, need Saint_Cad (Taylor Swift) to see this immediately!
Everyone else, “at ease”. What I’m looking for is proof (I think we call it “cite” around here, which a snooty way of saying the same thing).
Kind of? It’s a little more than just “hey, maybe this.” The scientist (and a lot of others) did a lot of advanced modeling that shows that this hypothesis matches some of the observations. But you’re right, there isn’t a way it could be definitively proven.
But that will change, once we go back to the moon and start drilling. They already have some idea of what Theia is made of; primordial Earth goo, now commonly called igneous rock. Find that inside Luna and we can measure the specific gravity and we’ll have a pretty good idea of what’s knocking around undigested in our interior (and like salmonella no good can come from it.)
PS as is well known, specific gravity is 1/6 on the moon which makes science a lot easier.
…they have found chunks of the small planet Theia**, which** collided with the Earth to form the Moon**,** in our mantle.
All right – why the heck aren’t my changes bolded?
spaces. the asterisks have to be right up against the first word in the string to be bolded, and right after the last word in the string, and there has to be a space before the asterisks, and after the asterisks.
Theia , which collided with the Earth to form the Moon , in
That means you can’t bold a comma and preserve normal spacing, because you can’t put asterisks inbetween a word and a comma; there needs to be an initial space.
Oh, really?