[SunkenCiv]

Thumbnail courtesy University of Warwick/Mark Garlick/CC BY 4.0
Natural Plutonium Discovered Beneath The Oceans Shows Cataclysmic History | Scott Manley | May 27, 2021 | YouTube

[cuban leaf]

Probably fallout from the nuclear war on Mars. :D
https://www.amazon.com/Death-Mars-Discovery-Planetary-Massacre/dp/193914938X

[Pollard]

Well we don’t really know what’s at the core of the earth. Maybe the whole planet runs on nuclear energy.

[Seruzawa]

Unless its not from space but from an earlier nuclear war.

[a fool in paradise]

Gojira?!!!

[Terry L Smith]

In the Bhagavad Gita, there aree stories of wars one could conclude were nuclear.

[KarlInOhio]

Unfortunately the abstract didn’t give the ratio of iron-60 or plutonium-244 to their daughter isotopes to give an idea when they were deposited.

[bobbo666]

Two potential natural sources. First, every element heavier than iron came from inside a star, just like our sun is made up of stuff roaming about the universe from earlier stars that blew up. That is how baby stars happen — older, bigger ones blew up.
2nd, plutonium could have come from another one of those natural reactors in earth’s crust — like the one found near the eastern coast of Africa. Around Nigeria if I recall the map correctly.
I guess they don’t teach this stuff in high school physics anymore. Shame.

[Sirius Lee]

Amazing how the universe recycles spent stars.

[Bratch]

[AdmSmith]

Thanks, it is a very good presentation by Scott Manley. He has more good videos https://www.youtube.com/c/szyzyg/videos