Before 1986 there have been twelve "public" core meltdowns, and at least six, likely more, incidents not public on nuclear subs, etc.

~ https://en.wikipedia.org/wiki/Nuclear_and_radiation_accident...

You should look up how many live armed nuclear bombs have been accidentally dropped on mainland US soil.

More significantly, there's been a lot of above ground and atmospheric tests that have draped residuals across the planet, and a bunch of dirty Russian / former USSR sites that drift trace across Europe.

> Before 1986 there have been twelve "public" core meltdowns

Significantly before in relation to the 5.5 M year claim?

> You should look up how many live armed nuclear bombs have been accidentally dropped on mainland US soil.

Did they explode in a way that would lead to workers in Romania being able to detect their radioactivity in their cave?

There have been natural nuclear reactors, but I don’t think any suffered a catastrophic event.

https://en.wikipedia.org/wiki/Natural_nuclear_fission_reacto...

Isn't there a nuclear bomb sitting somewhere in a swamp in the USA that everybody lost?

"Yes"

- TBH I'd be surprised if it's still "lost" - not further reported on because [ XXXredactedXXX ] is more likely.

Also, if the finding is never recorded, it can be used to frame just about anyone who can be accused of finding it and smuggling it out of the US.

You could just look for isotopes from the atmospheric nuclear tests that were conducted? Doesn't need to be a reactor I would assume?

Indeed. That's one of the reasons why the "Before Present" time scale (that uses 1/1/1950 as the epoch) is sometimes called "Before Physics" (another one being that 1950 is less and less "present", of course)!

> that uses 1/1/1950 as the epoch

I guess we can say this is when humankind reached adulthood, became able to drink and got a driver’s license. And a gun.

Yes.

But also, finding something from within the last hundred years doesn’t say an awful lot about something claimed to have been a closed system for millions of years.