3min chapter

Earth Ancients cover image

Dr. John Brandenburg: Confessions of a NASA Space Scientist

Earth Ancients

CHAPTER

The Rise of Xenon 129 in the Earth's Atmosphere

Xenon 129 was a sure sign of the nuclear weapon going off. So they would monitor the air for that and they got really good at it. And what you can see in the Earth's atmosphere is Xenon 129 has risen slightly because of not only hydrogen bomb testing, but also plutonium production makes some Xenon 129.

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