Hey everybody, I'm Coach Bill Courtney from the Oscar-winning documentary, Undefeated.

I believe that our country's problems can never be solved by a bunch of fancy people

and nice suits talking big words that nobody ever uses on CNN and Fox, but rather bang

Army of Normal Folks. Us, just you and me saying, hey man, I can help.

Our podcast and Army of Normal Folks is building up this army that I think can change this country,

and I hope you'll join us wherever you listen to podcasts.

L.I. is expansive. There's nearly 10 million people living here, and it comes with a lot of noise.

But if you tune those sounds out and listen close, you'll hear the real L.I.

What up, mean bar, hey Jim. I'm going to be a father. Yes.

You feeling this? A fiction podcast mixtape about love. Listen to it on the iHeartRadio app,

Apple podcast, or wherever you get your podcast.

Welcome to Brain Stuff, a production of iHeartRadio.

Hey Brain Stuff, Lauren Volkobom here. As wild as it seems to us today, there was a time when

the United States, the Soviet Union and other countries tested nuclear weapons by exploding

them right in Earth's atmosphere. From 1945 to 1963, when such tests were finally banned by an

international treaty, more than 500 nuclear bombs were detonated, releasing radioactive fallout

that spread far and wide across the planet, causing harm to the environment and human health.

For example, everyone who's lived in the US after 1951 has been exposed to nuclear fallout,

and for some, it's resulted in an increased risk of thyroid cancer, according to the CDC.

But for scientists, that fallout has also provided an important measuring tool.

The tests caused a spike in the atmospheric concentration of carbon-14, which is an isotope or

form of carbon that's radioactive, but also occurs naturally, just not usually in such a blump sum.

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