The most interesting part of his lecture was about polonium halos. They are present in granite rock from El Capitan in Yosemite National Park. The half life of polonium is so small... Like seconds (or maybe less) that a "slow cooling" rock like granite should not contain polonium halos. Well, Robert Gentry found the polonium halos in the granite... Which could be formed if the granite cooled instantly. So, the halos are evidence of an instant creation.
His website: http://www.halos.com
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