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As usual these people leave out the fact that Polonium is a daughter product of Radon decay and Radon is a daughter product of Uranium. Uranium isotopes have very long half lives. Uranium-238 has a half life of 4.5 billion years and Uranium-235 has a half life of 704 million years. It is true that Polonium isotopes have very short half lives but they are constantly being generated by the decay of Radon. See diagram below.
Note the three isotopes of Polonium.
These fools are out to dazzle the scientifically uneducated (which is most of humanity) in order to prove their misguided at best views.
Just google Uranium, daughter, products.
Bert
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