Anonymous ID: 45ecdc Dec. 24, 2025, 11:25 a.m. No.24024078   🗄️.is 🔗kun

>>24023979

>There is no natural source for this

false

part of natural decay series of both U-235 and U-238 (spontaneous fission)

other potential decay series exist, eg, ones ending with Xe-137 by beta decay into Cs-137

would require further digging to trace decay chain back to a naturally occurring isotope, but one or more prolly exist

Anonymous ID: 45ecdc Dec. 24, 2025, 11:30 a.m. No.24024096   🗄️.is 🔗kun

>>24024065

>The only thing more bizarre than this enigmatic marvel of engineering is that we do not know exactly who built it, how, why or even WHEN…

 

last glaciation